)
By all means, if you have been having unprotected sex and expected a period to come, go ahead
and take a
pregnancy test. Two weeks after you think you ovulated, most
pregnancy tests are accurate.
But it can take a while for prometrium to work to bring on a period (especially the first time you use it), so that might be what is happening.
If you're trying to get pregnant, I hope that is the reason your period didn't come when expected after stopping the prometrium.