Similar story here too. I had put it down to DS2 being upset about the new baby as it coincided with that, but maybe it is just because he is 2. He is a pest to get to sleep and then wakes during the night. He only wants mummy to settle him when he does wake. It is frustrating and I often feel like a bad mum because he ends up in tears, but it would be worse if he was awake for another few hours (for him too, not just me and DH).
Thinking back DS1 was an absolute pain to get to bed at around this age. We used to lie with him in his bed to get him to sleep. Now he is a dream... read him some stories and then he climbs into his bed and goes to sleep, we don't hear from him again for nearly 12 hours. He hasn't been a problem for a long time, so rest assured it does get better, though it might take a while.