Thanks guys I called doctor they said everything is fine.
It is normal to have light bleeding after sex. It's due to extra blood flow that you're heart is pumping for baby. You're gums can bleed too when brushing or flossing this is hormones as well. I had the samething happen to me. If you are having cramping or heavy blood flow or Braxton hicks four in a min go to the doctor. To ease you're mind just call you're doctors office and let them know what's happening so you can be reassured everything is fine.
I would definitely call your doctor about that because I've had slight belly pains from intercourse right after but never vaginal bleeding. Better safe than sorry!