Going low while sleeping

i am just about to leave for my first year at the university of arizona and my biggest fear is going low during the night/morning.  i have had two bad experiences of going too low and both were while i was sleeping, and going off on my own scares me a little bit to think if there is an emergency i might not be able to handle it.  when i sleep in i make sure to test myself midmorning, but that still doesnt always prevent the lows.  anyone else feel this way or have any advice for me? i would appreciate it, thanks!