Hey Stan,
I would go and see a doctor but in the mean time try not to worry, reality is a flighty beast at best and we all hear and see things from time to time that may or may not be there. Try not to get too anxious about it as this could lead to derealisation which you seem to be suffering from mildly at present along with associated paranoia these things are most likely going to pass as long as you don't start to panic too much.
Do not do any more drugs until you are OK again and even then psychedelics don't sound like they agree with you so best to leave them alone.
The real issue with hearing stuff and seeing stuff is how you react to it, all this sounds more like anxiety than a serious psychological problem I'm sure your doctor will have you sorted in no time.
Have a read up about Quantum Physics this might give you some perspective on how unreal the allegedly "real" world actually is :D