2 day “period” on pill?

I’ve been on the pill since January and we always use condoms. Haven’t had sex since 2/8. Got my period at the end of February on time and normal flow. Got my “period” the last week of March but this one was suuuper short. Only lasted 2 days and was barely a flow with barely any cramping. Only had to use one regular tampon once and like 2 pads. Blood was dark brown and dark red with some small clots. My periods are usually 4-5 days and are usually fairly heavy with a bunch of cramping. Am I overthinking this? Pill + condoms + bleeding? I’m worried I got pregnant in February but am still bleeding.