Abnormal spotting

Hey y’all,

So today I started spotting. I’ve never done this! I’ve had my period regularly since I got it in 5th grade. I’m now 22 and spotting for this first time 16 days before my period. I guess I don’t have a question but more like a concern. Why am I suddenly spotting? To answer the question ahead of time yes I had sex with my boyfriend recently. We did it in the shower for like 4 minutes bite then got out and it later continued in the bed room with a condom on. I’ve also been on birth control missing a few days here and there very rarely.