Yes, trying different formulas to see what she likes/can tolerate, as well as mixing it with your milk to ease the transition. However, if she is lactose intolerant, you may want to think about continuing to breastfeed her. Unless you get a hypoallergenic formula, which is very expensive she will have problems on formula if she is lactose intolerant, and most babies who are lactose intolerant are also soy intolerant, so a regular formula will not work. My daughter was lactose intolerant and I breastfed her because she hated the hypoallergenic formula. she obviously couldn't tolerate the others so it ended up breast-milk was best for her. If she is lactose intolerant that does not mean she can't process breast milk it means she can't process cows milk. Breastmilk should be fine for her, tho you may want to limit how much dairy you consume(may or may not affect her). I was never a big milk drinker anyway, cream in my coffee and cheese and yogurt, that sort of thing. And my super allergic baby did fine with me having smaller amounts and by the time she was 4 months old, I could eat it all again fine. She nursed for over a year with no problem, but she is still lactose intolerant for cows milk products. Unless you can get her to take the hypoallergenic formula I would stick with breastfeeding. But the easiest way to transition is to mix it. I had to mix almost all breastmilk with just a little bit of formula to get my daughter to take it. So start that way and slowly increase the amount of formula. Hopefully your baby will adjust to it. But if not, you can still nurse a lactose intolerant baby. I know if you are going back to work that pumping can be a pain, but anyone can do it, a friend of mine is an ER doc and managed to do it, even with the crazy long hours and little to no time to pump. So if she can do it, anyone can.
