cramping and bloating, not late on my period yet though

Hi,

I've had unprotected sex with my BF twice in the past couple weeks. I had my last period, beginning of the month and now it's time for my next. So, I'm feeling the usual symptoms, but the only difference is that it hurts very much to have sex. He feels a difference too. I've taken a text, but it was negative.

I'm going to see a doctor tomorrow, but I was curious of any useful information I can read prior to my appointment tomorrow.

thanks!