Well to start off, around december of 2016 i started to get diarrhea every morning.This continued into 2017 and later came shortness of breath in April of 2017.But In May while eating baked macaroni one night i suddenly started to feel the need to vomit then immediately started to feel dizzy, then shortly after my heart started to pound and i also began to shiver these symptoms were beginning one after the other. This continued for months(especially the dizziness) slowly subsiding, but even today i still get sick sometimes where as some days i would be able to move around for weeks without feeling sick. Oh and also, when i eat certain foods like snacks my stomach makes a gassy noise and i get a little nauseated and recently had shortness of breath. I also tested for parasites and h.pylori but it came back negative. Am really tired of this. Thanks
Have you been stressed? This is definitely anxiety symptoms. It makes it worse if you know anxious, it drives you crazy. I had a lot of anxiety symptoms. Hopefully you get better. 
Have a doctor or pharmacist check all your medications. They may not be compatible with each other.
Have you tried eliminating the trigger foods from your diet to see if you feel better? Maybe ask for an endoscopy and colonoscopy. Have you had an ultrasound? Have you had any shifting abdominal pain? See your doctor again and ask about gastritis and IBS.