No sleep

My guy has been sleeping 5-7 hours pretty regularly for the last month and a half, and I kept telling my husband I wonder when it will end. Well mamas, last night, we woke up every 3 hours on he dot. I forgot what that feels like. I feel like a zombie this morning. So to all of you mamas who have been doing this (and sometimes more frequent) since birth, I seriously admire you. Because we’re gonna be surviving off coffee today. Also any ideas what could be going on?? 9 weeks tomorrow.