Real bad Pelvic pain

I'm not sure if it's pelvic pain or ??? 😴the front part of were my underwear goes was hurting really bad for about 30 mins today I couldn't walk right or anything I drank a take action pill ( something like plan b) about 2 weeks ago I'm suppose to get my period on Sunday  .. What's up??? What's going on? Don't be rude please I'm just wondering if anything like this happened to any female on this 😞😒