Feeling all over the place...

I'm not sure if this is to rant or to find out if I'm the only one that feels like this. I am 25weeks and I feel tired often- I've been going to bed a little while after my other children but when I am up and about I feel like everything needs doing. Very much the same as the 'nesting' feeling. I have sorted cupboards, sorted you boxes, written 100 todo list. I'm familiar with the need to get everything done but not so early, I've already got 4 little people and I'm working full time. I don't want to over do things but I'm really struggling to be able to settle and relax. Are there any other mummy's that can relate?