need advice. please help!

SHOULDER POPPING IN AND OUT PLEASE HELPHI, I HAVE BEEN ABLE TO POP MY SHOULDER IN AND OUT OF IT’S SOCKET FOR AS LONG AS I CAN REMEBER. NOT UNTIL ABOUT A YEAR AGO OR SO I HAVE NOT HAD PAIN. NOW EVERY TIME THIS HAPPENS I HAVE PAIN IN THE JOINT AND ROTATOR CUFF AREA. IS THIS NORMAL? THE TIME I WENT TO THE DOC FOR IT HE JUST GAVE ME RICE AND PT. I NEVER THOUGHT OF IT TO BE TO MUCH OF A PROBLEM BECAUSE I HAVE HAD KNEE PROBLEMS THE PAST FIVE YEARS AND 5 SURGERIES IN THE PAST THREE. BUT NOW AFTER THAT LAST SURGERY 3 WEEKS AGO MY SHOULDER HAS BECOME MORE PAINFUL. I WORK AS A VETERINARY TECHNICIAN WITH LARGE AND SMALL ANIMALS. I’VE NOTICE IF I REACH UP OR OUT AND TURN IT POPS. I HAVE DAYS WERE THE I CAN ONLY GET RELIEF BY HOLDING MY SHOULDER AS IF IT WERE IN A SLING. IM GOING TO TALK TO MY ORTHOPEDIC SURGEON IN THREE WEEKS WHEN I GO BACK FOR MY KNEE CHECK-UP. ANY SUGGESTIONS ARE APPRECIATED.