Maybe I shouldn't post this because I'm in my mid-60s and you're probably much younger, but I started getting intermittent pain in my groin and was going to a physical therapist for pain in my back. He suggested I get an MRI to know exactly what was going on. Turns out that there's a labral tear (cartilage) in my hip and I'll eventually need a hip replacement. I thought for certain I had pulled a groin muscle but unfortunately that's not the case.