OMG, I vividly remember sitting with my DS at 3am while he screamed at me... and thinking "what the hell have we done????" Our age gap was 2 years 4 months and it was hard with a new baby. There were times I genuinely wished we hadn't had a second child, I thought things would never be ok again. But everything settles down and settles in and now I can't imagine only having one child. It's still very early days, things will get better. Make sure you talk to someone about how you feel and like the other girls said, accept all offers of help!

Congratulations and good luck!