gday mate,
was the groin strain on the same side?
each of the adductor muscles (adductor magnus, brevis, longus + gracilis) attach around the pubic ramus so im thinking there may be an interaction there. have you seen anyone about it or had any scans done? im not sure that gracilis would be exerting a very strong pull on the ramus but it is possible that tightness in the other adductors would increase the stress placed on that bony segment, although this is strange as you haven’t been doing great volumes of work on the track. footballers (soccer especially) use their adductors intensely (kicking from the insole + stabilising) so this would definitely have an influence.
the hamstring injury is probably unrelated (IMO).
pulling on the reigns may be hard now but a stress fracture (especially in this area) could become a serious issue in the long term so i guess its a case of being mean to be nice