Time for me

One of the hardest things for me to do is find time for me. I dream of sitting down to do something creative, or sip a cup of coffee and read. I hardly ever do. It's an interesting phenomenon, really. I used to blame it on work. Back in the day, when I first got married I had so much extra time I didn't know what to do with it. I would move all the furniture in the house twice a week, and clean under it. Move everything in the kitchen, and wipe down shelves. I washed floors on my hands and knees so I could scrape paint off the ceramic tile. When I was done, I'd bathe the dog, cut her hair and nails, and then hop in the shower myself. After that, lunch, and it was maybe 12 o'clock.  I would spend my time reading, painting, playing guitar, dreaming of doing something else creative or browsing the web for new recipes.
When we moved to the states, I suddenly didn't seem to have that time anymore. Sure, I was working. I blamed it on that. 40 hours a week, plus cooking and keeping the dog groomed and keeping the house clean, laundry done, etc, etc.. Then we bought a house, so now I have a garden that while I love gardening, somewhere around July it gets overwhelming and I long for frost to kill it all so I can start over with a fresh palette.
Now I have a three month old daughter, and I try to blame "never having time for me" on her. Cook, clean, laundry, take care of the partially neglected dog. Really, I don't know that my little Sirenita (Mermaid) is the cause of my never having time for myself. I think it is probably in my head.
I clean the entire house top to bottom twice a week. You will never open what you believe to be the butter, only to find a fuzzy green world growing new life inside it in my fridge. I wipe down the wood work, the doors, wash the floors, dust... But is it all necessary?
My to-do list grows longer instead of shorter, and I occasionally put "play guitar" or "paint" on it.  When I get to the point where I could do it, something in me sees a smudged insect on the window, and off I go! Windows, closets... Always cleaning.
Can anyone relate to this? Why is it so difficult to have downtime? It feels like I always have to be "doing something." I think this is a slight OCD trait that is in my head, and needs to be conquered. Anyone else have this problem? How do you deal with it?