Anorexia recovery

If anyone is in or has been in anorexia recovery how on earth do you deal with the bad weeks? It’s like every month I try so hard on my better weeks and then low and behold same time every month the switch flips and I get the worst physical and mental symptoms that I can barely keep myself safe or alive.
This has been one of the worst months in a very long time as it’s the first month in years and years I have consistently gained the weight I am required to and locked in hard on recovery and ofc when the bad weeks hit oh boy did they have that to latch onto. Generally the only way I can keep myself safe and still on planet earth each month is by oh sigh of relief restricting and losing any weight or anything I may have gained during my “better” weeks but this time obviously given the effort I had put in/following meal plan for once the weight wasn’t a “quick fix and I no longer had my safety net I have every month.

How how how do I ever get through this?? I feel like the biggest hindrance in me ever recovering is my PMDD. Because I quite literally cannot control the onslaught of SI, self blame, hatred etc when the switch happens. Not to mention the loss of appetite, digestion issues, bloating and physical exhaustion and pain symptoms