Bleeding during sex

Ok, so I am 8dpo and two days ago I was having second with my partner when I noticed really pinky blood. It only happened just then and didn’t carry on after it almost looked like spotting. I’ve had a headache that has lasted like 24hrs which isn’t unusual for me if I’m pregnant, and last 3 days I’ve been so so tired.

Could this be down to just a bit of rough sex with the bleeding? Everything else I can put down to other reasons as I’m trying not to get my hopes up so I’m not disappointed. Has anyone else had this and get a Bfp