I tore my abductor muscle training for cross country marathon. It took six to seven weeks before I could run again but I took ibuprofen for a week then started massages and loads of forward and side lunges ice packs for a week and try hot water bottle packs all helps with blood flow to area.I don't think your injury is as bad as there was no way I could run on mine without intense pain.
Cross trainer in the gym kept me fit ( no impact).
Also get your girlfriend to massage all areas this will help with moral.
Good luck
Well at least you now know what it is and seem to have the right info on rehab. I wish you all the best on recovery this is one injury I have not had yet? Best wishes. Ynwa
Find a four leaf clover and get some blooming luck. Sorry not much use but squats and slow one legged squats 10 reps x3 will help I had runners knee and saw physio he recommended this to me it worked for me. Again good luck