Poor you sad I'm 35 weeks and have just gotten over a similar flu. I had 2-3 vicks inhalations per day to help clear up my nose - with one just before I went to bed. Just a teaspoon of vicks in a bowl full on hot water and a towel over your head while you breathe in the vicks will do the trick. Also try sleeping propped up with a few more pillows, it will help you to breathe a little easier at night. My poor hubby resorted to sleeping in the spare room for a few nights. Apparently I sounded like a warthog breathing/bubbling underwater (TIM?! - his words not mine!).
I also had lemsip - my midwife said it was OK to take up to 3 lemsip or paracetamol per day. You can't take cold and flu tablets with decongestants in though - apparently they can raise your blood pressure in the third trimester.