I stopped hormonal birth control at the end of December. My husband and I have been using condoms and coitus interruptus (the pull-out method).

I've had two regular menstrual cycles that came right on time since stopping the pill. This month, my period is now officially a week and a half late. It's never been this late before. Since my period was due, I've taken 4 home pregnancy tests, all negative.

My symptoms are a dull cramping sensation in my lower abdomen, slight constipation, occasional backache, slightly tender nipples, and I had some bad heartburn a couple weeks ago. I eat a very healthy diet, so it's not the result of a poor diet.

The negative pregnancy tests have been reassuring, but I've read stories about women who are pregnant despite multiple negative pregnancy tests. Is it time to see a doctor, or do you think I'm overreacting? Again, I've had 2 normal menstrual cycles since going off the pill, so this is very strange to me. It just doesn't seem to be coming.