Exhausted

LJ • Baby girl born Feb 19, 2015 and second girl born Jan 20, 2017. Baby #3 due in October!
I'm taking care of a 3 year old boy right now but can barely keep my eyes open. Only 3 hours of sleep last night. I haven't had caffeine since before I got my BFP and I'm 9w+3d. Any suggestions as to how to wake up without resorting to coffee?