Hi there and welcome. Well, it could be a fluke. That happens. Brown spotting can be old blood coming out. Or . . . it could be implantation bleeding. Time will tell. Do you know exactly your period is due? When it is a few days past if a regular period doesn't start, I would buy an early response at home pregnancy test, use first morning's urine and check to see.
Pulling out is playing with fire. If a pregnancy would be upsetting, I wouldn't put yourself in that position. Be really really strict about this to protect yourself against a stressful situation! good luck
My period is due on Friday so should I take a test after then? The bleeding has completely stopped now. We aren't putting ourselves in that position again. Thanks very much for all your help.
I would wait a few days after that and then take a test if your period hasn't shown up. Good luck and let us know what happens!