If she still takes a nap, can you take a nap with her? It might help in the energy department come bedtime for her.
But if it helps to know, DH and I "count the seconds" til our AD is asleep these days because he's in that "almost done with naps" limbo and is up late every other night seems like.
But neither of us is pg, so you are doing well!
And when you have 2 of them, my advice is, take a nap when the AD naps, and let the baby nap with you if possible. I didn't have that situation because my other child was 3 when my AD was born, and was done with naps long before. So she played V-smile when the baby and I napped, if I couldn't get her to lie down with us.
Bless you and hang in there.