Pain during sex

Renee • Happily Married
Recently while i was ovulating my husband and i had sex quite a few times. Granted it was kinda rough but each time it hurt like hell in the first couples mins. The insides of my walls felt like sharps pains then after a while it goes away and feels normal again. But each time it was like that the first couple of mins. I tried to open myself up some to help i guess but i just tell my husband to take it slow and try to get thru the first uncomfortable part. So my question is do any other ladies experience pain during sex in the first couple mins? Could this be because im ovulating during the time or something more serious?