Hey i no exactly how you feel and must be alot worse with already being tired during pregnancy,
i found a great way with my sone who is now 2 and sleeps from 7.30 till 7.30, i kept being told i should try controlled crying with my son when he was about 10 months but it seemed such a horible way for me and my son,, but the way i do it now is based on that,
i give my son a bottle downstairs at 7 get him dressed and calmed down, at 7.30 i take him 2 bed have a routine so i read a book and he relaxes, i also have a cd player in his room that reads books to him, i leave the room within 15 minutes when im comfy to and my son seems calm, i then sit in my room for 5 mins, yeh my son would cry but after the 5 mins i go bak in and lay him down i dont cuddle him or talk 2 much coz he will expect that everytime and it will take longer, i then leave the room and this time stay out for 10 mins, when i go bak in i repeat as before and leave for another 15 mins then repeat and do 20 mins,, it may seem sad seeing them cry but they get tired and my son has not cried over the 25 min break so it does work for me, these days he is alseep by the 10 min gap but doesnt even cry at all,
if he wakes in the night i do the same thing so they no they cant get away with it, and in the morning i give lots of praise and all is forgiven so u wouldnt need to worry about that, its an idea that worked for me, if you need any more info on this u can always message me il be happy to help,, hope u get this sorted asap, good luck xxx