Help please ?

So I’m lesbian, and I haven’t had sex with a dude . But are their ways I could still accidentally get pregnant ? Like if I’m showering AFTER a male who jerked off and didn’t clean it up? Or if I sit on a toilet with sperm ? I’m asking because out of no where sometimes recently the inside , I think my cervix , starts having a slight pain and pressure . And google said “pregnancy” or “cervical cancer”, and I haven’t started my period yet , my last period was October 31st. Or am I okay?