I'm not really getting this. Are you worried about a hypo is your level drops too low? You say you are not on meds...are you on a low carb diet? What do you normally do when you sleep..isn't that a similar length of time. Unless your are used to levels dropping very low, I would not panic about it...if you are on a low cab diet...maybe up the cars slightly just before 3am? I'd mention it to the medical team, if you are really worried and anticipating a hypo...if not...I'm not quite understanding some of your words...sorry.