This is a tricky question. I think that it is possible to be aware of psychotic hallucinations. My intro psych professor, however, insisted that people with delusions are always 100% convinced that their delusional thoughts are true. If they doubt the thoughts, then the thoughts aren't delusions. I suppose that he could be wrong, though.

During my first episode of depression at age 12, I had some religious delusions. I thought that I had done something horrible (not writing what it was because it is too shameful/embarrassing, sorry), and that to make up for it I had to run away from home and become God's prophet. I was 100% convinced until the day came, and then I doubted enough to not leave my house. Sometimes I wish I hadn't doubted; maybe the police would have found me and I would have gotten help a lot sooner...