Fellow ladies! Week after period, just light bleeding/spotting. Thoughts??

I had my period feb28-mar4. Ended mar3 really since I didn't have any flow on the 3rd (4days) - (not usually my normal) according to my app, I was only 1 day late on my period (should have been the feb27)

I am on BC. I had sex on feb24, with a condom.

Mar 10 I had bleeding - it was dark brown at first and now just red, with some blood cloth sometime. I'm a bit worried. I never missed my BC, and we were careful and check the condom. Any opinions? I keep reading about implantation bleeding.