Potty training help, 4yr old girl!!!?

My daughter is 4. She has been potty trained since she was 2 except for at night time. We have recently tried to get her trained at night. She was in pull ups and had several dry nights. She did so good the first 3-4 nights, but has had accidents the last week straight. I am also 3 months pregnant. She is very excited to be a big sister, so I don't think this has stressed her out. I am so tired and get frustrated because I know she can do it. I try my hardest not to show it, as I know it is not entirely her fault. We stop drinks after 7-7:15 and make her go 1-2 times before bed. She has started to wake up right after and will come to us. So this seems to be an improvement from sleeping through it. I am just not sure if there is something else I can do, or put her back in pull ups...??? At first she was remorseful, now she just kinda comes in and stands there until I wake up. ha ha. We know she knows its wrong. I just don't want her to feel like she is failing. She says that she does not want to wear pull ups anymore, so don't want her to feel humiliated if we put them back on. This pregnancy is just wearing me out, I have a very hard time going back to sleep afterwards and have only been getting 3-4 hours of sleep a night with a full time job and morning sickness all day. I dont think there is a health issue because she has proved she is capable of holding it through the night. If anyone has anymore ideas or thoughts, PLEASE HELP!!