Is sleep deprivation induced (still fully aware of reality) hallucinations damaging in any way?

(please, only serious answers, for I am a little worried) I am prone to sever cases of insomnia. Some nights I would get at most, 2 hours of sleep & this will last for several weeks. Even on such little sleep, I am fully functional, aware, not drowsy or fatigued in any way. The only down side (besides laying in bed, staring at the ceiling for 6 hours) is that I have these hallucinations. I’ll think that I am seeing insects crawling on floor, or the feeling that they are one me. I know that what I am seeing/feeling is not real, but it still worries me. Is there any damage being done to my brain? I have recently gotten a sleep aid, but it’s not always effective. Any one have any insight on the matter? Thanks.