ANY HELP WOULD BE GREAT!!!!!!! helppp

So I went to the doctor on Monday (the 3rd) because I have been throughout g up sense last Monday ( the 27th of March) every time I eat I throw up almost right after or like 20mins after. My doctor said I could be pregnant but it would be way to early to tell in a test so just wait till this Friday- today and see if I start my period.  It's only 7:15 am. I'm having little cramps but that was when I put my jeans on which r a little tight around my tummy..... still have the urge to throw up..... I took a few tests and they all said negative... am I crazy? Am I over thinking this? I know I should and I am going to wait and see if I get my period this weekend and if I don't I'll take a test Monday morning, then go from there.