Struggling to stay alive!

Hi Guys,

I am hoping someone can help, I have been battling problems for the last 4 years, it all started one night when I ate a musely bar before going to bed - I woke up with the feeling of vommiting, dizziness, shortness of breathe, weakness, sick to the stomach, very afast heart beat (feels like its about to pop out), feeling of discomfert in the stomach, feeling of needing to goto the toilet.  


Symptoms I have after I eat or drink anything:
* dizzy
* nausea
* light headed
* bloating
* heart palpitations
* Bloating
* Extreme flatuation
* Tiredness
* Confused
* Heat sickness (I feel sick in the heat?)

I dont vomit, I haven't vomited in the last 4 years that I have had this problem.  When I burp or fart I feel relief, it feels like the gasses aren't leaving my stomach instead there getting stuck in there which makes me feel very sick.  This happens every time I eat ANYTHING. I constantly feel confused and I cannot concentrate - it almost feels like I am not controlling my body anymore.  

4 years on and I have done the following tests:

endoscopy
colonoscopy
holter
catscan
bloodtests
urine tests
stool samples
breathetests for lactose & fructose intolerance (which were positive) - my doctor requested me to stay away from foods with dairy and sugar, so I did and I went on a gluten free diet, no luck and same problems.
bicom

I always feel sick after I eat anything, even if I drink water.

I also feel sick for a few hours, I dont excecise anymore because it feels like I cant breathe after I do, my stomach gets really hot and my head feels like it has no oxygen running through it, I get very dizzy and I feel like I am going to collapse, it literally paralyzes me.

breathetests for lactose & fructose intolerance (which were positive)

Previously I have had no food alergies or problems with my body, I was fit, slim and very active.  Sometimes I feel like I just dont want to live with the pain anymore, but then I think of my gf, my family and my friends.  I love life and I feel as though this is really putting everything down & eventually it will lead to more serious problems which I am scared of.

My doctor prescribed me anxiety/depression tablets, I took it and about 1 hour after I took it - I had the same symptoms but WORSE, I literally pooed myself in the living room, I couldn't walk, breathe, do basically anything - the ambulance came and took me to the hospital that night.

I am scared to take medication now after that incident.  I dont know what to do... please help!