Suggest Treatment For Long Lasting Stomach Pain

Hi, I m 15 years old and throughout pretty much my entire life I have had a bunch of stomach aches that sometimes result in puking. I could not go to sleep tonight because my stomach felt very shaky and unsettled So I sat up and read for a while. After I started to feel better, I decided to lie down. But as soo as I did, the stomach ache came right back. Later on, I tried laying down again and did for about 8 minutes. Then my legs started to shake, like I was really cold, and I had some abdominal discomfort and bloating. It won t go away and I m very shaky and occasionally I get a dizzy feeling. Also, on top of all that, I have had seizures throughout my entire life. The strange part is I have only had 6. They are usually a year or two apart, but sometimes closer and sometimes farther apart. I have recently become vegan because me and my parents think that a lot of my stomach issues could be from dairy. I have also gone gluten free for the same reason. But here I am with another stomach ache. The first week of being vegan was good. I felt better, because lately I had been having stomach aches after every meal. But in the past five days, I have had a stomach ace about 4 or 5 times, sometimes with the dizzy shaky feeling. As you can see, it s quite upsetting to me that no matter how I change my diet, it doesn t seem to be helping in the slightest.. I also have frequent muscle twitches, that don t hurt.. I Just hope I can get to the bottom of this as soon as possible so I can start feeling good again