Oh man I've been there. More times than I'd care to recall. it's really hard when your little one takes forever to fall asleep. It still takes DS1 between 30mins and 2 hours or so to go to sleep. every night. I feel your pain!

last night DS1 woke up at 12.30, barged into our room sooking and squealing and DP just lost it. so did i but to a lesser degree. i left the room to calm down and then came back to get to work. everyone was awake and upset. It took me 90mins to get both kids back to sleep by myself. After that I couldn't put DS2 down because if one wakes, so does the other.

don't beat yourself up over it. you're human and it's ok to make mistakes. it's how you learn from them and adapt that counts.