Was advised to massage my scalp on the 10th day post op after FUE transplant to help remove scabs? Are my grafts falling out?

Shedding of the transplanted hair is perfectly normal after a hair transplant procedure and will occur anywhere from weeks 2 to 6 post op. Continue to follow your doctors post op care instructions and happy growing. 

Your doctor should have mentioned that this would happen- transplanted grafts usually fall out between a week and two months following a transplant surgery. As long as you aren't pulling hard and they are coming out more or less on their own and there's no sign of trauma such as blood, it's incredibly unlikely you've down any damage to your grafts. They should all start growing back in the next several months!