I think you need to get it checked out too, its a good idea to listen to your body when you are pregnant, I finally learnt this after having a difficult time this pregnancy.

I have finally stopped running around like crazy everything that was going wrong is easing (morning sickness, fundus height too small and a bad back)

At the end of the day it may be difficult for your boss if you stop work now but if its what is best for you and bubs isn't it more important?