Did your PT approve/recommend all these glute exercises?
If not, you have most likely re-torn the tissue or some of the tissue so you have slowed down the healing process with those strengthening exercises.
I've posted this a few times in the past. I've written about it in my book. I'll repeat it here for the benefit of others. You have
The healing process for injuries goes IN ORDER like this.
1. Stop running. Avoid further injury.
2. Restrict range of motion. Stop swelling/inflammation (RICE)
3. (Optional) Surgery if required.
4. Continue to restrict range of motion. Use support (crutch/tape/boot/cast), if necessary
5. Rehab (gradually increase range of motion and strength over time)
6. Strengthen to prevent reoccurrence (drills)
If you jump straight to strengthening without allowing the injury to heal, you run the risk of re-tearing some strands of the torn tissue and those strands have to start healing all over from day one.
The #1 problem for runners is skipping from stage 1 straight to stage 6. Another problem is to immediately start static stretching. Generally speaking, unless you're regaining range of motion under the supervision of a PT, it's best to avoid static stretching entirely and only do dynamic stretching.
Having said all this and if you followed your PT's guidance on these exercises, it could be scar tissue. If so, you should stop running at the first twinge and take a few more days off. You can do non-impact cardio to stay fit... spinning or elliptical, for example.