so, I am a mommy to two wonderful boys :) of course both pregnancies were different. so now I want…

so, I am a mommy to two wonderful boys :) of course both pregnancies were different. so now I want to know your thoughts on my situation. I have been nauseous for over a week, extremely tired and overly hungry, ridiculously hungry. I had very light pink spotting for 4 days, only when I wiped. my lower back has been hurting for a few days now. I have gotten two negative tests. period was supposed to start yesterday. anyone had anything like this? can't get to the Dr til later this week. just want to know what's going on....