We had similar fun and games with DD between about 10 and 14 months. Brought a whole new dimension to sleep deprivation. In the end I finally listened to the Bear and tried taking the mattress out of the cot and putting it on the floor in her room. I could lay down beside her to get her to go to sleep, and same when she woke through the night. It was much easier for me than having to get her out of the cot and then put her back in. She started sleeping better about 13 or 14 months. She is still not great, wakes up once and sometimes twice, but 95% of the time it only takes about five or ten minutes now to get her to go back to bed and sleep.
it is such a hard time and it does terrible things to you losing so much sleep - and being pregnant too it must be a killer. You'll get through it one way or another. One thing it has shown me is that I can function on less sleep than I ever imagined. Not something I ever wanted to learn but that's life!