J.A.
I have this problem sometimes, too, but fortunately Jacob isn't waking up in the middle of the night anymore. I've read that moms should have their own bedtime routine just like we do for the kids...dim lights, relaxing/soothing activities, same time each night, etc. etc. It's difficult to do, though. You could add some candles (just be careful about falling asleep with them lit) or some kind of lavender/bedtime scents.
Good luck. I hope it gets better. It's no fun to be tired all the time. ;)