My advice would be just keep up with your VRTS. My blips would last weeks too feeling just horrible. Its apart of recovery. By trying to goto another PT maybe useless. All they are going to do is give you exercises that BalanceofChicago has posted on the boards. They dont have a magic pill to make everything go away. Honestly, many people felt a turning point around 12 months or so. This illness you can not put a time on it. It will go away when your brain has been retrained.
I would give yourself time to get better. You really havent had VN for along time, eventhough it feels like a lifetime. I know its hard with kids, but I also worked everyday with it. It was really hard, but I think overall it helped me.
Docs say that recovery time is 2-3 years, and I think that they are right. Most people that recovered on the board took roughly around 2 years.
You know what to do, keep your activity up with your VRTS. Just stay strong!