is this breakthrough bleeding? please help

boba

so i’ve been having this brown bleeding for a week now and today the blood was slightly red. also idk if those thick parts are clots or discharge? i’m on the pill so i pretty much breakthrough bleed throughout the month but idk what this means. my partner and i were last active a week ago from today (we only get to see each other once a week) and i took a pregnancy test 2 days ago which came out negative. is this just really heavy breakthrough bleeding? i also often bleed after intercourse too but i think it’s just from the breakthrough bleeding. i don’t imagine it being BV since i don’t have any symptoms of it. and i’m having a hard time believing it could be implantation.. and i’m not trying to get pregnant. any help please??