Dull, aching pain in side?

I’ve been having a dull and achy pain in the lower left side of my abdomen for the past couple days. I’ve been having cramping off and in that same place but never as bad as now. I did have to take a plan b pill so I don’t know if that has anything to do with it but it feels like my ovary is being twisted up. The pain also sometimes radiates into my knee. I’m going to see a doctor soon but I just didn’t want what this could possibly be. Has this happened to anyone else?