I'm too scared...Please give advice?

For about a year now i've been reading up on lucid dreaming, tried it a couple times. I usually get to a point where lights start flashing really bright in my eyes and then i can't handle it so i wake myself up. But my main point is that after reading some more i discovered that if i OPEN my eyes during SP im going to hallucinate? This terrifies me more than anything else. I don't think i would ever try again if i hallucinated. I mean I already "see" things in the dark so I imagine this would be much worse. Any experience or advice would be great thanks.