It’s been plaguing me. It started about two weeks before Christmas. I’d be down a couple of days, then up but out, then I’d be alright, then I’m only a day or two away from being 100% and then WHAMO!! I’m down hard. Again. I’m coming out of the third and LAST wave of it right now. It horrible interfered with my already-scarce and oh-so-precious time with my whelps. That’s a story for another day, I’m afraid. If you don’t already know, you will.