Unfortunately, I cannot diagnosis of what is causing your pain. I also suggest you make an appointment to see your primary care physician.
Best of luck to you.
Jennifer R RPh www.drugstore.com
Re: pain in groin.
You need to see your doctor. It probably isn't serious but you need to see a doctor. It could be exercise-related, an injury, or none of the above. I had a groin pain that lasted for months and months and only after going to a urologist/neurologist and getting shots to the area (I think it was pain blocker/anti-inflammation medication mix) did it subside.