I noticed that you said it started before your baby was here. So, my guess is it is the house. You first need to make triple sure there isn't any lingering odor in the spot she is urinating in. Is it just ONE spot? If so, scrub it good with some special product for the treatment of cat urine. NOT just soap and water. Then, I would place the litter box smack dab on that spot, EVEN if it is in the middle of the floor. This is just for training purposes. Keep it there for one month. Don't move it before that. AND, keep it very clean. Make sure she likes the type of litter you use, and I wouldn't switch litter brands, either.

After one month, move it 6 inches towards where you want it to evenutally be. Leave it there for one week. Then, the next week, move it one foot closer to where you want it to be. The next week, another couple of feet, and so on.

My guess is she kind of freaked out, and became insecure when you moved. AND then, there was the addition of the baby, which is further stress in the household.

And, keep in mind- just because there wasn't a physical problem back when you took her to the vets doesn't mean there isn't one now.