I Have A Left Side Piriformis Strain - Has Been

I have a left side piriformis strain - has been aggravating for the past 6 weeks and I have gone from being able to run a half marathon down to 20mins. I have been rolling it out, itb and hips as well, stretching and have taken time off, using voltaren tabs and gel but with no improvement. Can I continue to train? I am a triathlete training for ironman.