Why stretching hurting my leg?

For context, I danced throughout middle and highschool and was pretty flexible. I stopped dancing 10 years ago.

I started getting back into fitness at the beginning of this year and wanted to work on my flexibility. I was doing pretty well and almost got my side splits again. However around 4 months ago, I think I overdid a stretch and pulled something in my right groin area. Since then, I always feel pull sensation when I try to stretch my right leg and it's preventing me from wanting to keep stretching every day.

Any tips on how to relieve this area? I've tried resting it for close to a month and it's still not getting any better.

Not sure if I'm posting on the right forum.