There are many reasons behind hallucinations, not just psychosis. I had vivid hypnogogic hallucinations as a child and still sometimes have them now. It's due to a malfunction of REM sleep that occurs as your falling asleep or as your waking up.
Sometimes meds can cause them, migraines, other medical conditions, stress. Many religious people see them as a part of their faith, I believe it is possible to hear God as do many people. I think it does depend on whether the hallucinations cause distress or impairment in functioning. If you are still concerned it maybe worth speaking to a pdoc.