Well that royally sucks. Having had that happen to me, I know its really not a nice feeling or a place to be in. It must be especially bad at this time of year.
Don't know the specifics of your situation, but with mine, I was let go at the end of the month, with no warning, and just before the two year protections would kick in. I was effectively put on gardening leave for the following month. I then treated that month as if my full time job was to get a new job. I justvapplied for everything, chased recruiters, went to interviews and then was able to get sorted.
It wasn't the nicest of feelings though for sure. But there is light on the other side.