Iliopsoas issues

Hi all - I was wondering if anyone has had experience with weakness/tightness/pain in your psoas muscle. 

At the end of January'12, my lower back on the right side went into excruciatingly painful back spasms without warning.  After a very painful week of immobility, I slowly returned to normal activities and was able to start walking on a treadmill by the third week.  (Normally I am very active, and I was building my base again for my 2nd Ironman in August - not happening now).  My physical therapist gave me the green light to try running a few minutes after the 4th week, and to get my heartrate up before running, I put the treadmill on a very slight incline while still walking.  Within a minute, I felt slight pain in my right groin.  For weeks I thought nothing of it - the pain was annoying, but not limiting.  I was able to progress to fast walking, elliptical, stair climber, and lifting.  I decided to hold off running until the pain was totally gone, but at the end of April, my groin pain took a turn for the worse.  Now I can't walk for more than 15 minutes without moderate pain and tightness that seems to spread to my hip and feels like I'm "locked up" on the right side.  No swelling, bruising, or tenderness.  Feels great when I wake up, but starts to annoy me as the day goes on.  As of 3 weeks ago, I am not doing any activity, and I'm limiting walking whenever possible.

My doctors have ruled out hernias via CT scans and examination by a surgeon, and the back issue has been resolved.  I just got X-rays of my hip, and the ortho said everything looks great.  I'm getting an MRI (hip arthorgram) next week.  Ortho doc says I have a very weak right psoas muscle that is likely very inflamed.  Treatment would consist of steroid shots and strengthening the psoas.

Just wondering if anyone has experience and/or perspective with a similar condition?  What was your treatment?  How much time did it take to heal?  The groin issue started back in February, and I'm eager to get back to feeling normal and doing the activities I love.  I can't believe how long it is taken to fully recover.

Thank you so much!