Shoulder Injury/Problem?

So first of all i am a fitness and workout teenager. I eat extremely healthy taking multivitamins each morning and proteinshakes preworkout and after workout. I'm currently 18 and have been working out for about a two years. Recently Though, about 3 months ago, i was doing shoulder press standing up and felt clicks and pain in my shoulder. The next day the pain went away so i kept doing shoulder exercises for about another 2 weeks. Suddenly during a bicep curl i started hearing clicks/ripping in both my shoulders. I don't know if this is a torn rotator cuff or not, but i have done alot of research into it and knew that i should cease all shoulder work immediately until i talked to a GP. I've scheduled a mri but the clicking is still present. It's been killing me not being able to work my shoulders and they have visibly suffered, my chest and back workouts have also been less intense as i want them to be because of this. I've been focusing more on my cardio and abs as to keep training parts of my body that don't require my shoulders. Anyone have any suggestions of whats wrong with my shoulders or what i should be doing in the meantime to get them strong again?p.s. i can lift both my shoulders up and around in any direction without any pain, but i hear/feel alot of clicking in it. I've also lost more or less all my definition in my shoulders as they used to be of muscle, now are more or less flat and square looking, and i can pop them out of place and my shoulder blade sticks out of my back, i don't know how normal this is or not.