I too ma exhausted, but I'm a bit further on and mine is pretty much pain-related.
I don't know what to tell you, at around 34 weeks I just accepted it as the whole feeding thing like you said.
See what your doc recommends I guess.

Maybe you're just anxious or excited, and your brain is working over time. DH and I call it your 'drunken monkey'. You know, when it feels like there's a drunk monkey running around in your head and you can't get it to sit still or stop talking?

I hope that you get some relief soon.