Pregnancy risk after sex on the pill + condom + Plan B? Dark brown spotting and cramps 8 days later
I’m on day 8 of my second combined OCP pack (my fourth month on the pill). I took my pills regularly and started the next pack immediately, without a break, for the first time to avoid a drop in hormone levels.
I had sex on day 20 of my previous pack, and we also used a condom. My partner ejaculated inside it and continued thrusting 2–3 times before withdrawing. He didn’t lose his erection during this time. The condom didn’t slip, but the semen seemed to spread along the inside rather than collect in the tip. I noticed whitish/creamy fluid around the outside of the condom’s base, on his skin, but I’m unsure whether it was semen or vaginal fluid.
I took Plan B (levonorgestrel) about 2 minutes after sex. I also take lamotrigine. I’ve read that lamotrigine may slightly reduce levonorgestrel levels, but I’m unsure whether this meaningfully affects contraceptive efficacy.
It’s been 8 days since sex. I experienced cramps and dark brown spotting, which now seems to have stopped, but the cramps persist and are stronger than the mild cramps I usually get on the pill.
Could this be breakthrough bleeding caused by continuous pill use and Plan B, or could it be implantation bleeding? Is pregnancy possible in my situation? I’m very anxious Any advice and reassurance would mean a lot.
(I also took metronidazole for only one day and stopped taking it 7 days before sex. I’m worried whether it could have affected my birth control’s effectiveness.)