GERD? stomach ulcers? nerve problems? anxiety?

alright so im actually 20 years old but i found really good responses here..

i used to be normal... just plain normal.. everything was fine until i got a panic attack somewhere in early 2011 due to stress and that's when my life changed.. every single day whether it was in university or whether i'd go out id get anxious and id feel tightness in my chest.. feel like my tongue is heavy (i hope someone knows what im talking about).. getting heart palpitations... feel like i cant speak as well.. and for some reason when im at home im fine but when i go out all this happens to me.. at the early stages id feel like my throat was congested and i thought i had throat cancer.. i realized later after a lot of research that i had anxiety.. after a few months it developed and i started getting the tingling in the hands and arms

i used to get so scared when this happens.. i swear it affected me greatly.. i felt sometimes that i was going crazy or out of control.. and i used to look at everyone around me and just feel so jealous that how the hell are they all just fine and im not!!

so in late 2012 i began to be able to control my anxiety.. until i got a panic attack due to excess caffeine and that freaked me out again.. but then i researched and realized that excess caffeine is a main trigger of panic attacks...  so after that i got a grip of my anxiety and i was fine and id go out and get like 10% anxiety which would come and go.. but i once got a feeling of the palpitations and etc again and i researched and found out it might be GERD.. the symptoms are very similar to what i have and for a few days i was calm

now only recently have i started feeling gas, nausea, burning feeling whenever i eat anything or even drink water, yesterday i was scared because i felt that my front legs (from the knees to the ankles) are just numb (no tingling.. just this weird feeling of loss of sensation) and the same in my forearms and hands.. it's not major they just feel weird but i can move them.. so today i bought B-complex because it probably is something in the nerves.. and my stool is a bit loose too.. i feel as well sometimes like im losing balance as though im going to fall over even though i know it's not the case and i never do and even when i feel this loss of balance i tell myself that i know this isn't going to happen... but i guess this could just be a stomach infection or something of the sort.. i dont feel weak and dead tired though like a food poisoned person would.. but my toes can get cooold

the thing is.. im scared.. all this and i never have been once to the doctor regarding any of these issues... i dont live in the states and i dont really trust the doctors where i am... and i know it's all just something normal or in my head.. i was athletic until about 3 months ago i stopped working out because i get scared that something will happen to me when im at the gym... i used to love going for jogs and would go jogging just to feel better.. now if i go for jogs id come back and not feel like eating with very little nausea and id feel derealized/depersonalized.. i get a lot of that otherwise anyways.. 

im always just worrying about the hours of sleep i get whether i ate or not whether my body has energy whether this whether that.. im so paranoid to be honest.. i sometimes check symptoms online and some say anxiety some say GERD some say cancer and freak me out haha.. but then i just get over it after checking the risk factors.. some say it's a peptic ulcer..

i know i know i should get checked.. i just want to know if all this could be caused by anxiety even though i did get a grip on it but with time things just got worse and worse because they're there.. and i want to know if anyone else feels or ever felt the same way.. to be honest im not a big fan of meds im more of the natural medicine kind of guy.. and i know if any of you share the same thing and it really is just anxiety then i can get over it with myself...

im just scared and keep thinking about what this could be.. i know seeing a doctor would be the smart choice but to be honest i just want to hear you guys out first.. sorry for the long message and i hope i get some good input.. i guess your stories would comfort me (hopefully telling me that this isnt something dead serious) and would really relax me

thanks a lot in advance!