take a week off then
for two weeks avoid: shoulders presses, bench presses, military presses etc........also avoid standing biceps curls
just do light lat pull downs, triceps pull downs, biceps preacher curls, rear deltoids..
you can do legs normally
after those two weeks , start trying some dumbbell presses (light weight) and if it is ok, start adding more movements like presses, but stay light weight as long as you don't hurt...if you do hurt then go back to week 2 and so on...
if everything goes ok stay light weight for about a month adding weight gradually...don't worry you caught it probably on time...it does not seem that serious ...the main thing is not to get your injury to worsen .......you just need to go on a maintenance type of workout for a while....
stretching extensively is not very good, stretch slightly after you have done some warm up with very light weights....you can use the cross cable machine to stretch.