How did I get all this weight to begin with?

I decided instead of a series I would just use one post to cover this topic

When I was younger I was always skinny. I could eat whatever I wanted without thinking about it. When I got out of High School I was 130 pounds with a 28 inch waist. Oh I wish I could get back to that. So what happened?
The first 10 pounds.
I got pregnant gained a total of 30 pounds and then only lost 20 of it. I don't know why that last 10 pounds didn't come off. I used to take the baby for walks and was generally very active.  I guess I just need to chalk it up to my body adjusting to parenthood. I would be thrilled if I could even get back to 140!
The next 10 pounds.
I got pregnant again gained 30 lost 20. Do we see a pattern forming?
The rest of the weight.
I have had a total of 8 children all with the same weight gain pattern. Also I used the depo shot between a couple of them and was told by my doctor that one of the side effects is weight gain, and not just a little bit but like 10-20 pounds.
As I look back I can also see that I became less and less active. I am trying to reverse that but Newtons law of motion keeps getting me. You know the one something in motion tends to stay in motion and something at rest tends to stay at rest. With each baby I needed to spend a lot of time feeding so I was sitting quite a bit. Every chance I got I would take a nap. As I got more kids it became more difficult to go for walks or even just go to the park because it was such a big production to get everyone ready.
I developed some very lazy habits and now it's time to change. I have found that if I try to change too much though that I always revert to my lazy ways. That is why I am doing little changes each month in hopes they will stick.