I'm in a similar boat.

I'm a marketing guy, and have started to regret my career path. I've made it to several final rounds in the past year, but only wound up with rejection at the end—at the final stages, it can be real subtle things that lead them to make that final choice of one candidate vs. another.

On top of that, I'm taking care of a toddler full time, since we can't afford a nanny since I got laid off, so I have even less time to dedicate to the job hunt / skill advancement, and honestly I'm so exhausted by the end of the day that I'm too drained to work on projects that require real brainpower. It's been a slog, but I'm hanging in there and not giving up.

Otta.com has been a great, easy resource for job hunting.