weight loss

I use to weigh 123-124 lbs i'm 5 5 and a half recently i was having some sudden pain in my stomach . the pain was so intense it brought me to tires the next the i weighed myself i was 115 lbs. i eat a lot , i eat meat, chicken much protein but still i'm losing weight i use to a lot of muscle i'm a lean type of person but now i'm losing some muscle particularly in stomach region(abdominal secction)why i don't know ????????

[remar]

You really should see your Dr to find out what's going on. If your still eating the same amount of food yet loosing weight, then there's a reason this is happening. I wish I could tell you what it is but I'm not sure.