Bleeding after sex but halfway though cycle

So 2 days ago I had sex and for some reason it made me bleed. Im only half way through my cycle so I’m confused why I’m bleeding it’s only quite light bleeding but I’m still bleeding right now. Does it sound like anything serious? I’m scared because my mum had cervical cancer and I keep worrying it could be related to that. It didn’t hurt or anything. So I’m confused to why I’m bleeding. Does anyone have any advice? Anything would be helpful right now. I’m making an emergency doctors appointment tomorrow