I'm 38, physically healthy, with a loving family and a good job. I've always been a little high-strung (my mom called it "over-sensitive"). Sometimes it serves me well, as I think it gives me insight into how people are thinking and feeling. Most of the time, though, it comes out as worrying, particularly about things that are very likely not going to happen. It got much more serious when we had kids - I worry constantly about them and what might happen to them. It occasionally leads to bouts of depression and feelings of despair. My wife describes it as "all the alarms going off, but there's no fire."
I consider myself pretty high-functioning: I maintain good social relationships, I have a technically difficult job, and I interact well with my family. But often I feel like I'm just keeping the tide back and that putting on a brave face is the best I can do to get through the day. Those closest to me know that I struggle, but most people probably think I'm a fairly happy, normal person.
In this forum, I'm looking to encourage others and be encouraged likewise. I know there's no "cure" for what ails me, but talking about it with like-minded people always helps.