The occupational therapists called it "boom and bust". I prefer to think of it as "snakes and ladders".
When I moved over into that other place, the land of the sick, I became a player in a never ending game of snakes and ladders. Some days I jog along fine, seemingly unaffected. From time to time an obstacle blocks my path but by dogged determination and perseverance, somehow I overcome. All the time, I'm moving forward. Perhaps a little behind my fellow players. But I'm advancing all the same.
There are even days, sometimes months, when as if by magic the universe seems to roll me double sixes and I shoot up ladder after ladder without a backward glance. It seems like I'm on the cusp of winning and I can hardly believe my luck.
Then all of a sudden I glance down the path and there's a gurt big snake sunning itself in my way. Before I know it, I slide all the way back down its slimy back and find myself further back from where I started.
When these setbacks occur, as they inevitably do, it's hard to not regress back to childhood and behave like a toddler. You want to sulk and have a tantrum. You wish you were playing a different game. You're angry that everyone around you seems to be doing better than you in their game, having more fun. You shout and bang your fists, hoping to knock their counters off the board but this only serves to set you back even further.
Of course, there is another way. Instead of being a bad looser and spoiling things further, you can keep your calm, pick up the dice and roll again...