Hi @wingingit987 didn't want to read and run as I am in exactly the same position, 2.5 year old, pregnant (not hugely but 1st trimester and very poorly!) and DH works late so lots of solo bedtimes.
DD has always been a good sleeper, the not going to sleep started in Jan and we thought it was another quick sleep regression that might last a couple of weeks. Is it May now?! Haha
Anyway we started off going in a soothing her reminding it was bedtime but didn't work. Then we tried leaving her to cry but we always broke and it therefore didn't work. I read a book and some stuff online and thought we'd made it worse by leaving her so I went to sitting in her room next to the cot with the story tape on until she went to sleep. I think the record was 3 hours but it started to get better. Then last week we went right backwards and she was messing around, asking for everything under the sun, wailing about different problems (like hand hurts, hair in eyes... nothing major...!) basically buying time and I'm sitting there holding her hand for hours on end reminding her it's bedtime.
This also coincided the last couple of weeks with a general surge in tantrums and wanting to get her own way. I've had to really toughen up as I felt like her flipping slave. Anyway I've took this attitude with bedtime too... I felt like I have no choice, I've been ill, I'm tired, I need to look after myself and the pregnancy and I'm spending hours sitting on the floor whilst she basically takes the mickey... I think it is fuelling other dictatorial behaviour from her.
4th night in of leaving her to cry and it's worked so far. 1st night was about an hour, and I cried a bit too outside the door. But she wasn't constantly screaming she was messing and babbling too. When she cried or shouted me I put my head in the door and said 'go to bed' so I wasn't ignoring her, but I didn't go in. I did this every time she properly cried or shouted mummy. 2nd night was half an hour much less crying. 3rd night was 10mins and last night was 5mins and only 3 shouts for mummy no actual crying.
I was terrified of leaving her to cry have read all the things that talk about why you shouldn't, the mental impact, etc etc. I said I'd never do it. But I had no choice. Last night for the first night since Jan I had my tea at 7.30... then went to bed myself! I have to look after myself too and I do feel being at her mercy at bedtime was making her think she ruled me. Lots of telling mummy what to do at the moment.
Anyway hopefully that story is helpful if you're thinking of things to try. I'm aware we may go backwards again but I feel like we've made some progress this week.