hi dont feel sorry for writing a long description...cos it helps with a history taking.
i understand the condition has turned chronic.cos u had problem in aug & still exist with pain on particular movements. groin starin does take some time to heal cos usually along with addoctor muscle the ligaments(pubofemoral lig)too may get stained .It is important to rest following the injury to allowed the injured muscle to properly heal. Allow pain to guide your level of activity; this means that activities which cause symptoms should be avoided.

Stretching gently is helpful, but it should not be painful. Stretching excessively can be harmful and slow the healing process.
Heat Applications
Before activities, gentle heating can help loosen the muscle. Apply a heat pack to the groin prior to stretching or exercising. As a general rule of thumb, remember to heat before, and ice after.

Anti-inflammatory Medications
Oral Wikipedia reference-linkanti-inflammatory medications (such as Ibuprofen, Aleve, or Motrin) can help relieve symptoms of pain and also calm the inflammation.
Physical Therapymodalities such as ultrasound, therapeutic massage, and specific exercises particularly helpful. You should visit a physical therapist to determine if these would be appropriate for your condition.
hope these r helpful