Pregnant ? Spotting ? Period ?

Two weeks ago I had protected sex but the condom got stuck inside of me and when I pulled it out there wasn’t that much sperm in it and it was deep inside me and I wasn’t sure if I was good so I took a take action aka offbrand plan b and now I’m spotting but I just had my cycle 3 weeks ago . I’m not sure If it’s my period because it’s usually heavy and this is really light. I can go a whole day without changing my tampon and I wear super plus ! What do you think ?