Shoulder injury

[Erezasu]

Hi,
Im having weird shoulder symptoms for 2 months, went to see an orthopedic and made an MRA scan which came out with nothing.
My symptoms im having are kind lf tired shoulder, my right shoulder is getting tired way faster than my left shoulder,
After workout i feel my muscles are heavy for days.
I did a break for 4 weeks and yet it didn’t help, got back to workout with low weights and still feel shoulder fatigue in the days after.
It may be irrelevant but 5 months ago while doing bench press i heard a knack on my neck and on the day after my neck got stiff real bad and ever since my neck is not the same ans im having higher back and neck sharp pains on some movements on the same side of the injured shoulder.
Does anyone have experienced this or something similar?

Thanks