Burning during intercourse

Hey ladies I’m 6DPIUI and I just had sex tonight for the first time in about 3-4 days and it was really painful. Iv never had painful sex in my life even when I was on Clomid sex wasn’t painful. I’m taking Estrace Estradol to thicken my lining Iv researched symptoms and it actually saids that it’s suppose to make sex more comfortable by helping with vaginal dryness. Vaginal pain is not even a side effect according to google. Does anyone know why I would have so much vaginal pain. Could I be pregnant?