A little bit of everything

Hi. I'm male if that's of importance to the issues mentioned below. I'm 17 now and I'm tired with my bodily health. I've put up with it and not whined for years now because I hate complaining when I don't know what the problem is. It's becoming difficult to stay happy. I take pride in the fact that I never mope around when I'm with friends or family, but obviously it's harder if you're feeling awful.

So anyway, there's a whole host of issues, I think it would be better just to bullet point them with brief explanations. Help out if you can, believe me it will be immensely appreciated.

The following problems have been life-long problems, regardless of dietary changes and physical fitness.

• Tiredness while exercising: I get tired and get stitches extremely quickly while exercising particularly outdoors. I can exercise for quite a while indoors but outdoors I can barely run a street length. Coupled with this I can't use weights because I get tired before I "feel the burn" every single time. In case you missed it earlier, this happens regardless of how active I am, it doesn't get any worse or better with exercise or lack thereof.
• I've always had stomach cramping issues. Some of the worst happened regularly during French lessons last year. There wasn't any obvious cause, I liked French lessons and there was nothing particularly bad that happened afterwards. I do tend to get more violent stomach pains when I'm nervous and worried however.
• On the topic of nerves, despite being quite friendly, open and carefree around my friends and family I find it excruciatingly difficult to talk or even make eye contact with somebody I don't know very well. This is worse with females. I find it awkward and feel the compulsion to look away and obviously it always comes off as dismissive.
• A more problematic issue are my violent and sudden mood swings. These aren't recent puberty affairs either. My entire life seems to consist of 70% happy me, 20% irritating me and 10% angry reclusive and all round hateful me. It's not like a normal mood change. Nothing observable causes it, I can just suddenly turn from happy and carefree into a spiteful and mean person. My family say there is a clear change, my eyes dilate, my skin grows pale, my posture alters and obviously so does my personality. This is a major issue, if you have anything helpful at all to do with this problem please don't hesitate to mention it.

The following problems aren't life-long but they're persistent and in some cases unbearable.

• The first and most important to me is my mental deterioration. In Senior School I could remember every I was taught instantly, I didn't need reviewing time, I didn't need notes. I just remembered and understood everything I was told. Now in college (this happened towards the end of year 11 too) it takes about a week for information to get imprinted into my memory, it's usually incomplete knowledge too. I'm muddled and confused all the time in certain lessons. I can't seem to remember things like Stoicism despite going over them 10s of times.
• I've been getting throat troubles. When you were little and you got told off by your parents your throat would sometimes start to ache right? This is what it's like for me at the moment, it affects my happiness and tone of voice whether I want it to or not. I've been told it could be stressed related but it is very difficult for me to become stressed, and this has been happening on and off for a few years.
• I get incredibly painful cramps in my left foot when I move it in the wrong way. By this I mean if I walk and bend my foot just a little bit too far I'll be in agonising pain for about 30 seconds. I don't know if it's related by when I sit down my second toe sometimes twitches randomly and this leads to the same thing eventually.

There's more but I think I'll leave it at that for now. I thank anyone who read this far, I know it's a lot to ask of someone who doesn't know me at all. My greatest thanks for any help you can provide.

Extra info:

• Never drank
• Never smoked
• 17 years old
• Male
• Fairly active at the moment - I walk for 1 hour every day at least. I have to break up lots of wood with a sledgehammer and saw (coal fire =D) Planning on running as soon as the cut on my toe heals.
• I get about 7 hours sleep a night
• I'm about 5ft 7 (that's a rough guess)
• I weigh about 8 stone (again a rough guess) Whatever the case my BMI is slightly below average.
• No Genetic illnesses other than heart problems in later life. (Granddad needed a triple bipass, can't remember the details, Dad has an irregular heartbeat)

Thankyou for your time.