getting anxious

no matter how often I go through this, it's terrible every time... end of project and contract is near and I am not sure what will happen after... where I'll work and live (though have preferences on where I want to be of course, would be lovely to stay in London) and just in general what will happen within the next half year or so. I know it would be good to concentrate on the now (while scouting ahead nevertheless) and I am trying to stay positive and believe it'll be alright and work out, which I manage most of the time, but today is just one of those days where everything seems so unsure and unsettling, it's driving me mad!