I am 8 weeks late from my last period, I havetaken two pregnancy test and they have come back negative! I have a light ache in my stomach constantly.
Oh, I was in similar situation two years ago. I thought I was pregnant so I took a test, it was negative, my period was two months late. So I went to my gynecologist, she did an ultrasound and she found that I have some type of cyst, it was nothing serious, but the cyst was preventing my period to start. So she gave me some super expensive pills %-) and after seven days I finally got my period... So the point is, you should do the same. You're probably not pregnant, but you should rule out the cause. Take care.