Could there be something wrong?

Hello everyone,

I'm nervous something could be wrong down there and wasn't sure if I should consider going to the doctors or not.. Me and my boyfriend have been together for 3 years (we've been having sex for 3 years as well, often times more than once whenever we see each other) and we've never had a problem. However, lately after the first time we have sex I become EXTREMELY sore as though we've never had sex before and I'm not sure why it's starting up all of a sudden. It's not as though we have long breaks in between seeing each usually just a day... Is this something I need to go to the doctors for there isn't any burning or itching or anything I just get really really sore? Could something be wrong?