What is wrong with me??? Im young and have way too much medical issues.?

I get soured stomach where i constantly burp and it stinks and i always have gas and farting. I have itchy flaky scalp, body itching all the time. water diareah when im sick, diabeties, acid reflux, , huge stomach, heel pain, a.d.d, anxiety, chronic headaches, leg and hip pain sometimes, major stress, allergies, tiredness, rectal itching, ongoing l infections, umbelical hernia. I am only 26 i have 2 children who are 7 and 4 im tired of feeling so bad all the time. I am 5'6 and like 280 lbs. I cannot seem to losr weight but i dont gain unless something like pregnancy or a new sugar pill causes it. i am not a hypocondriact thats one thing im actually not. Any help?