you could have been a little dry as your hormones are all out of whack. try some lube while you heal and if you are itching use vagisil. no bubble bath either
I had the same thing a few weeks ago at about 33 weeks too - no sex though. My doc told me to treat it like a yeast infection and to buy Monistat 7 day with the cream for the outside and the pill or cream insert for the inner parts. I would consult your doc asap as this is probably very uncomfortable and painful. Hope it gets better soon.
That doesn't sound normal to me when I was pregnant and had sex that never happened but I did bleed a lil bit.You should make an appointment with your doctor.