any advice

Brek
I've been sick for over 2 weeks headache backache puking Nothing sounds good to eat or drink I can only drink water. I tested a few times an they was negative I got my period which was not normal spotted 1 day heavy for 2 then spotted again which the 4th day was barely anything it usually last 5 days with a normal flow. I finally went to the doctor she thought I was pregnant told her I tested like 3 times all negative she decided to do blood draw that also came back negative. She basically wants me to wait till I get my next period (if I get it) which is 16 days away she has no answers as to why I'm feeling the way I feel. I have 3 kids to take care of so i need to feel better! I took another test yesterday just to see! I'm just at a lost that my doctor can't give me any answers