Hi, I Have Been Sufferring From This Recently Now. I

Hi, I have been sufferring from this recently now. I am afraid of going to sleep simply because I don't like the idea of losing consciousness and not knowing what's going on around me. I hate the fact that I have no control of my body. Every time I think of going to sleep I get afraid but when I do somehow fall asleep and wake up, I feel releived. Can you please tell me what to do to get over this condition? And can you please tell me what the condition is and if it is detrimental to my health.