You should worry about pregnancy if you have had any unprotected sex. And you are right every woman's body is different. The Dr. Told me to worry about nothing, but I know my body has changed completely. I get cysts on my ovaries now. If it will ease your mind any take a cheap pregnancy test and wait a few days to see if you period will come. Sometimes even though we really want to trust drs. And their opinions it is hard because they are only human and do make mistakes, and alot of the times all they can offer is their opinion. If you do not get a period, within a couple of weeks and and test negative on the hpt, I would call your Dr. Back and let him know. Sometimes they can induce your period with progesterone, but make sure you are not pregnant if they do this. Also, you may buy an opk to see if you have any lh in your system to see if you are ovulating.
By the way, thanks, since I have gone through 2 failed pregnancies, I have read everything there is to know about it, and fertility. I am trying to minimize my risks for my next pregnancy.
Nancym