You're fine brother. I've had the same experience with that pesky "internal" voice. It's a sneaky motherfucker. Some call it ego, some call it satan, some call it evil...ultimately it's a part of you. Just recognize it's patterns and work against the idea that it's schizophrenia.
If you feel scared and feel like you need to go to a psychologist. Do it. Just don't get to a state where obsession over this ruins your daily life. This is the true form of mental illness(the inability to be aware that you're obsessing over it).
Also, if you're rationally thinking you may be crazy, you're probably not. The psychologically disturbed don't initially question their state of mind.