I'd certainly chat to an LC to be sure, but I know several newborns (not mine unfortunately) that sleep 7pm to 7am and both Mummys have no probes with supply. You are doing an AMAZING job keeping up all that pumping and I will keep everything crossed for you that it's ok to drop the night-time pumping. You need and very much deserve sleep. You can get on with the sleepless nights when Jett is home with you!