For posterity's sake, when would have been the right time to leave? Keep in mind that the nature of my previous work is such that I did not have spare time on nights/weekends to continue working -- hence I just cut the umbilical cord :)
Then maybe you did leave at the right time and are just having a window of uncertainty. It will pass. What's important is that you have the savings to survive what could be a lengthy process. I couldn't have done the same but we all have different situations.
Don't second guess. What's done is done and now it's time to get to work. So get to work!