I would go back to the old job AND job hunt at the same time.
But mostly I am posting to let you know about a few tax prep program, VITA, run by IRS + United Way. Sounds like you are in a Head of Household filing class with 2dependents, even though you are not married. You may have rights to get more deductions than you have realized - head of household, # of dependents, earned income credit, child care(?), etc.
VITA volunteers look for all deductions, an defilement your Fed and state returns. A couple of years ago the AGI limit was $50K - certainly looks like you would qualify.