May you have peace!
Looking at the criteria for schizophrenia, it depends on the perception of each person and in itself is a relative definition. Those who hear the voice of the Son and the Father are not delusional because what they see and hear come from God, but the 'world' does not receive the witness we give no matter how many people tell them because they did the same to our Lord before us.
John 3:11, 12; John 3:32
They are not hallucinating because the things they see, hear, taste and smell are really there. They are just not physical.
I have not seen anyone who heard Holy Spirit and had 'bizarre' behavior unless something was coming (as in the case of Ezekiel, et. al.) that actually came true.
Speech and thoughts are not disorganized and there has been no social withdrawl, especially when Holy Spirit tells us to 'go forth' and make disiples and bear witness to the Christ and the free gift of holy spirit that anyone who is thirsting may come and drink.