I really don't think that is why but time will tell. If it doesn't improve with hard work over the next 6 weeks then I would consider asking for an MRI to rule in/out
Compensation takes away from the total work of the muscle and instills incorrect movement patterns but you will still get some strengthening going on. As a therapist I expect compensatory patterns to occur in the beginning. That is why I stress form above all else, and when that is achieved it is time for that to be a home exercise only. Work hard on your ER. Focus on that 1st to make sure you get that done in case you run out of time
Do you have exercises? You can always ask for PT once a week for instruction and progression only. If it were me I would go to a new set of eyes type of PT. It is impossible to do that long distance. As we said, form is key