For me going to 2 to 3 was a big shock, it was much harder than I expected but I had three under 4 and ds had reflux and problems putting on weight. We were also in the middle of moving when he was born too. The hardest part was getting out on my own juggling three was tricky with the two girls being so young they were still likely to bolt.
These days though I love it, they kids all play together and get into mischief but we have a lot of fun. I am finding that now ds can feed himself and happily play on his own or with the girls that I can keep up with the housework again.
So yeah it's hard but I wouldn't change anything, I get sick of comments about having three, one lady was really rude it front of my kids when they were all behaving!