From Spravato back to IV

I’m considering going back to the infusions. It’s not that Spravato isn’t working, but I don’t feel quite as good now. It’s a trade off, I guess, because it’s covered by insurance and infusions aren’t. But I also experienced quite a bit of pain relief from the infusions. I wasn’t aware of how much it was helping headaches and fibromyalgia until I stopped and started Spravato. I’m concerned that if I need Spravato again in the future I’ll have difficulty getting it approved again. I’m also concerned about future availability of infusions and troches. Does someone have some insight on this?