Pains??

Just a back story. I have a son who was unplanned, he’s 4 now, and my and my husband are ttc. I just got off my pill around Nov 2nd. I didnt take the last pill before the week of sugar pills. During the time I would have been taking the sugar pills, I bled, I’m assuming my period. My period was from nov 7-12th. Me and my husband had unprotected sex three times last week. Yesterday I was cramping like I was on my period but no blood. Is this normal? I’ve never tried to get pregnant before so this is all new to me. Should I be concerned at all? I’ve never had cramping when I wasn’t on my period.