Please help

So let me start by saying I have no idea what’s going on. I’m on the combination birth control pill and I take it perfectly. My boyfriend and I always use condoms and he pulls out before finishing. I always check the condom afterwards but it’s usually just by squeezing the condom to see if anything comes out. I last had sex a week ago on New Years following this same practice. I also want to mention that I was on my placebo week and that was the last day of my period. Today I’m on my 6th active pill of my new pack. This may be weird, but every night in the shower I check my cm to make sure it white and not the ewcm that’s associated with ovulation. I had already checked once and it was white like normal but the second time I checked it was this brownish discharge that I usually get right before my period and right as my period is ending. Why do I have it on my active pills??? Could this bee implantation bleeding? I’m really scared right now.