I hurt my chest little more then month ago. My chest is started to be good.but now my left shoulder(tore small part of my left chest) hurts like hell.. I can do inclines but it hurts little bit I never went over 60lbs and after 10th rep I had to stop. I did warm up with some shoulder excersises which made it better. Still I'm afraid this won't heal by itself
OK. Sounds like most probably the front delt, then. 4 weeks recovery time is not really sufficient if you're banging 'heavy' weight on - relative to what you're used to.
If I were you - I would see some professional help to get an idea as to the reality of the damage and in the meantime do a lot of shoulder warming exercises and light weight resistance. In other words simple side raises and front raises using light weight and many reps keep the muscle warmed up and a good blood supply.
There's plenty of online demonstration videos showing you simple shoulder rot cuff exercises to get strength in these areas which a lot of people neglect. The way they're put together you need to ensure complete safety esp after a fuckup.