Help??

I miscarried my first pregnancy November 15th and bled until the 20th. Went to the doctor and everything cane out and was cleared to have sex. We are a very active couple and have sex almost daily. My cervix was a little sore right away but after a few times all was good... until yesterday. Sex hurt yesterday and it felt like he was just jabbing my cervix! It was not a pleasant feeling and it has me all kinds of worried... has anyone had this happen? Is it a sign of being pregnant? Or an infection? I have no bleeding, haven’t gotten my period yet and no other symptoms of infection. I’m just worried something is wrong...????