I have a dumb question for you ladies. this is my fourth baby....I'm almost 12 weeks pregnant and…

I have a dumb question for you ladies. this is my fourth baby....I'm almost 12 weeks pregnant and every time my husband and I have sex it is really uncomfortable. I don't remember any of my other pregnancies being this way, if I remember correctly it was around 6 or 7 months when sex began to suck. I know you guys aren't my doctor but I was just wondering if anyone else has had this problem? anyone know what may be the deal? I don't see my ob again for another 3 weeks.