I damaged a tendon(s) in my left leg 3 yrs ago. They called it a "groin pull".
I could not move my leg for 2 wks at all...then when I could it was terribly painful. I ended up in physical therapy for 3 months. It was from a fall, when I landed on my left knee, falling forwards

I still get twinges in that leg, which are helped with Lidoderm patches, and conservative OTC pain relievers. I find increasing my magnesium helps alot too. Sometimes I use Flexeril to relax the muscles, at night.

I'd get evaluated to see if you are having tendonitis, or inflamed hip joints.

The adductor tendon combines 3 parts of muscles and attaches at the base of the pelvis. If it gets injured or inflamed it causes alot of problems.

I've been told to move slowly and stretch often, and avoid falls at all costs! Getting in and out of the car has to change. PT taught me to swivel around and get out with both legs equally.
Getting out leading with one leg is definitely out for me now.

You might invest in a cushioned toilet seat... or one that is very flat and not curved. My issues were made very severe, with an old fashioned toilet seat we had on vacation. (we have since replaced it).

People vary in their tendencies to develop tendonitis. Those tendons in the groin area take alot of stress and also shorten as we age.

So getting to a doctor for evaluation would be a good idea.
The PT I had was ultrasound and IFC electrostim treatments. They did a good job. There are isometrics you can learn to improve blood circulation to that area as well. This helps the tendons alot IMO. Now I am only stiff sometimes, and have a mild residual limp worse on some days than others.