Maternity Leave?

Incase there are any readers from the USA, here in Canada, we get up to 1 year off when we are on maternity leave.
When E was born, I worked in a job where my boss was pretty unhappy that I was off having a baby. And I kept in touch. A lot. Then when K came along soon after my return to work, the boss was even less happy. And I got a bit jaded and refused to call in.
Now with I, I have started a new job, and they are fantastic. BUT...having only been at the company for 6 months before my leave, and having only a 2 year contract has made me a complete spaz.
I mean, I love my job. Don't get me wrong. And I love the work I do. But sometimes I feel like I need to let go a little bit. I need to spend this year with my baby - my very last baby. I need to enjoy the moments of just her and I.
And then my drive (also known as my anxiety) kicks into high gear, and I race. I'm not even sure who I race against. Probably myself. But I take on too many things.
This year, I am on the school PTA, the daycare Board of Directors, I take my kids to swimming, skating, and gymnastics (although truthfully these are slowing down for the summer). Did I mention we also bought a puppy? So we also have puppy class.
And that doesn't include the things I like to do. Sew, knit, try to scrapbook...
And on top of all those things, I also do work from home. Yes...I decided to volunteer my time to work on projects from work. But seriously, it's like an addiction. Sometimes I'm so busy, the day just flies by. And maybe that's why I do it. Otherwise, I don't know what to do, because there is so much to do.
But, I have made a bit of a promise to myself. I have 2 projects left to complete. And after that, I am going to take the summer off. I am going to go camping with my family, and enjoy my 3 girls. After all, this will be the last summer that I can spend hours watching them grow without interruption from work.
What do you think - should I slow down?