I need an opinion from anyone who is interested in giving theirs... I currently work 5 days a week,…

I need an opinion from anyone who is interested in giving theirs... I currently work 5 days a week, 4 on evening shift (3:30-12) and 1 midnight (12-8:30) on my one midnight per week, I cannot stay awake... I take care of developmentally disabled adults with other health problems (such as epilepsy, diabetes, etc). I really cannot afford to go below full time but ever since getting pregnant, I cant make it throughout the night and I know its not safe for me to be asleep when the clients could need something. My supervisor has already told me that she cant (most likely wont) give me another evening shift and I really dont know what I should do at this point. What do y'all think?