I had something like this happen to me a few years ago when the insurance changed the rules. They ended up not paying for a few sessions we had already had. What we had to do was take the 30 sessions I get in a year and divide it up so that we could have a balanced amount of sessions throughout the year. Is the 6 sessions all you have till the end of Dec? If so I would say to count out the weeks left for the year and try and spread the sessions out.

With having 30 sessions a year I normally go every other week now. One month I go twice that month and then the next month I go 3 times. And it switches back and forth like that. Going every other week gives me time to recover. On the months that I go 3 times in that month. I'll have 3 weeks straight of T. So that's when T plans on doing harder work with memories so that we have that time to work. Then I get a break. So don't panic, because it can work out. But I understand it's scary. Good Luck and I hope you can work this out for the best.
Monty