5 days ago i had unprotected sex with my boyfriend, he didn't come inside me but obviously they leak when moving, but i felt sharp pains the next day for 2 days and felt really tired (the pain was nothing like a period cramp) the 3 day i felt almost nothing and the day later i woke up to bleeding which was dark and today the colour has got much lighter. I don't have a regular period but i was wondering is there any chance i could be pregnant and still get pregnant?