Could be oestitis pubis.
First experience pain/stiffness across my lower abdomen on Aug 14, and pulled up a little sore. Over the week, the pain stiffness has remained, and when running, there is pain in the groin area. After a run, I can sometimes feel this soreness for up to 24 hrs.
No runs over 45 minutes for a couple of weeks.
Physio worked on painful areas and rests for a few days after these to settle them down.
The worst pain seemed to come on after long runs, so I cut them out as much as possible for a while.