Serious question

So I'm currently 34 weeks pregnant & still having sex well I've been experiencing some pain down there/: it hurts like a burning sensation I know it's not a bladder infection I had that before & it doesn't burn when I pee or when I'm having sex just afterwards.. I noticed yesterday I was bleeding just a little bit idk if it was a cut or if it was coming from the inside but it left me worried is this normal?