I'm 19 and I've just started the pill, I'm in my 3rd week of it now, me and my partner have had sex without a condom 3 times since. The sex has been painful and I find I have had slight bleeding afterwards. I also have constant brown discharge... is this normal as I'm just starting the pill or may I be pregnant?

I had the same problem,
It's perfectly normal if you're on the pill.
Otherwise, if you feel at all worried, get a home-tester for pregnancy.
The best would probrably to go see a gaenicologist.

And ask about your bf's sex history. Ask him if he'll get checked too.

The quicker you get this resolved, the less stress you'll be in.

Good luck and Take care :)