idk what is happening

So last night I was asleep I kept waking up cause I thought something bad was going to happen. I didn't get much sleep. Then today around 1 I took a nap again I kept waking up cause I thought something was wrong. I'm normally not like this. I normally fall sleep and stay alseep. But lately j just feel like something is wrong and haven't been able to stay asleep. Oh then I was snacking all day cause I felt full. So I ate a few cookies and chips and drank some milk. Well after I eat I feel sick. I'm not too sure what's happening, I've never had this happen to me before. I've always been a bird while eating. I've never ate much. And I've never gotten sick after I eat,