Rotator Cuff Injury Symptoms, Diagnosis, and Treatment

I've been Injured since February with a tear. I see physio and nothing has worked I can do shoulder press with light weight but soon as I pick up 2kg dumbell and do lateral raises the pain gets worse. 😢 I tried doing dumbell rotation exercises as physio suggested external rotation was fine but internal rotation causes pain and grinding of my shoulder when rotating my arm from 90 degree angle downwards :/. Um so frustrated! I've had tricep tendonitis on the same side that seems to he healing but shoulder hasn't responded too rest or strength building what should I do? If you could give some advice be greatful