I too have been really tired with this pregnancy and I don't work (away from home that is). By 2pm I'm really flagging and have to have a sleep. I don't often get it because of my dd (19 months) who likes full attention when she is awake and trying to keep up on the housework for the 6 of us is a nightmare.

I have gone back on the Elevit tablets and they seem to have eased the leg cramps. Like you I was being woken up with them. I think I was low in vits and mins.

Good luck