Hi missrae. That sounds exactly like how I got on my current journey. I was diagnosed with PCOS, and all those possibilities sounded frightening to me (though I really don't want to have a kid, now, lol, I would like to have the option at some point). That was the kick that started me, though I've since found that it was a much milder form than my gyno originally thought.
I'd been taking a yoga/pilates class, and I started exercising a lot more. I really enjoyed the yoga class, and oddly enough, I am competitive by nature (though I know that's not the point of yoga), and I was getting aggravated that the smaller people could do it much better than I could, even though we'd been doing it about the same length of time. So in addition to lowering my weight to feel good and to look good, and to control my symptoms, I wanted to lose weight so I could do yoga better! I just keep thinking of all the things I can do better and how much better I'll look. And then I think about all the bragging rights I have.
Look at things that motivate you. When I first started watching what I ate (this time around), one of the things I did differently was to obsessively look up weight loss success stories or sites that are about how to lose weight and be healthier, and that sort of thing. There are millions of them, and many of them you can't help but feel like you want to get up and do something good for your body. One place in particular that I like is
The How to Think Thin Blog. There are a lot of good tips there.
And hang around here! Even though I've only been here a short while, after my weigh ins on Mondays, I can't weight to update my ticker, and see what people say about what sort of exercises, and the mini victories and major victories, and yes, even what motivates them. Tis a very helpful place. I have to lose a lot of weight, but there are people who are trying to lose the same amount as I am, and there are some who weigh about the same as me, and there are some who have lost that weight, and there are some who were in my place months ago, and I can see how well they are doing and how well I
will be doing when I get to that point in my journey.