Any time I make changes suggested by my endo, or even fellow diabetics, things don’t work out. I am my own best doctor. I just made a lot of changes to my settings on my pump after years of many lows and things are going fairly well but I also know it won’t last ;-)…
I changed my target setting from 100 to 120 and I changed my correction factor from 1 unit per 70 to 1 unit to 100, and I am experiencing less lows. I also changed my carb ratio at dinner time, but sometimes I have a hard time believing my settings and over zap, grrrr!!!
I also really watch the insulin on board and try to take that into account and trust my settings, that is the hard part as I want immediate back to normal when high, I am not patient. 
Congrats on the baby news I am so excited for you!!!