so for the past week or so ive been burping a lot but i didn't think much of it until after i ate last week and i got really bad stomach pains and i was burping too. the pain happens at least one a day and it feels like someone is stabbing me in my stomach. i also keep getting period cramps when my period is in 2 and a half weeks! yesterday the pain was really really bad. now i'm on holiday in france and all i am thinking of is ive got stomach cancer or abdominal sarcoma or some other type of cancer associated with the stomach. my other symtoms are feeling sick, nausea, dizziness and pain under the breast and tiredness (maybe the tiredness is due to the 18 hour journey we did yesterday) but will someone help me i'm really scared. also, i know stomach cancer is rare for teenagers (i'm a teenager) but ive still heard people die from it and there is a possibility that is could be abdominal sarcoma which is in the teenage range! please help me i'm so scared.