just get on with it. worst case scenario you'll have to move out to a rented place for a month or so.
we moved in here when I was 3 months pg with DS1.
DH took carpets off, sanded and varnished floors, sorted garden.
we painted ceilings and walls.
got our bathroom & separate toilet made into one bathroom and what it entailed.
I was laying patio slabs at 6 months pg.
pg with DS2 - I painted kitchen and put the new lino in for floor.
when he was 3 months old I repainted our smallest bedroom.
DS3 - DH got rid of carpet in hall, sanded and varnished floor & took wallpaper off in kids bedroom.
I painted that bedroom, plus repainted living room walls and staircase, hall and upstairs landing walls.
pg with DS4 - this was the big one. we had a loft conversion done in 2 stages, we moved in with PILS for 2 months as 1 stage involved - ripping out fire places in living room & dining room, plus chimney in 2 bedrooms. also bathroom was made bigger by moving a wall.
so new walls, some electrics refitting,plastering, new floor boards, brand new bathroom, new carpets
DH repainted ceiling in bathroom and those 4 rooms and I painted all the walls plus skirting boards.
I was on all fours doing this days before DS4 was born (ELSC at 39+2)
we moved back in 2 days before he was born!
when he was 4 months old the 2nd stage started - loft put in, so new staircase built, new room and bathroom put in, roof redone etc.
then we realized that the bits above windows were in such bad state they needed redoing. so we decided to get new windows put it - which in hindsight we should have done in first stage as each wall where a window was put in had to be replastered and partially repainted!
guess who was painting again!
so while I was at it I repainted small bedroom again, then when done I painted new room and bathroom in loft. I also repainted all radiators of course.
we got painters to deal with doors and the whole staircase, landings and hall.
I admit it was a lot, but we had no choice. we signed the contract with loft company and a week later I found out I was pg with DS4!
I honestly can't remember if I did anything while pg with DS5, but it wasn't painting. 
with DD I did a massive project for a competition with the children at DS3 & DS4's school - we made a quilt that all 270 kids contributed to. (we won!)
we are currently house hunting and our house has just gone on the market a few days after we decided to go for Baby number 7.
so there, you will be tired, but it can be done. 
OP sorry for long post, I hope it's inspiring rather then scaring you (and certainly not meant as bragging!)
the only thing I want to advise is if needed, get windows sorted first.
it was a real pain to have to repaint everything that's just been done!
good luck!