shoulder pain

hello all.Quick question….i stopped lifting 4 like 3 years and now i know why i stopped,when i started up again i had mild to med discomfort in my shoulder (prob rotar cuff but not sure)i had it when i stopped and 3 yrs later it hasnt gone away.Actually today’s workout was so painful in my bench i could barely lift anything,Funny thing is i can do all my pull lifts but no pushing.My question is do i just rest some more? Did i jump back to heavy? Is surgury inevitable? I just hope the pain will subside i really was enjoying getting back to lifting. Any thoughts or advice would be greatly appreciated.