Well it's a weird happening, after 7 consecutive PRs... I mean I was squatting 137.5x5 3 days ago... so there's not enough time to lose muscle in that time span so it has to be lack of rest (slept bad this night) and probably lack of focus/hunger to train. But the bar really really felt SO heavy.
As far as eating goes, I ate what I'm always eating: in the morning two eggs with fried chicken legs/breast, at noon home cooked food (soup or rice or mashed potatoes with some meat) and at night other meats/salami/whatever.
The one thing I didn't do was train legs ever since last Tuesday so that's a BIG reason for this dropdown as I skipped my half squat day due to feeling tired and bad so... it's been a week ever since I squatted last.
EDIT:
I mean I was squatting 137.5x5 3 days ago
I guess it was actually 7 days ago so that makes a big difference.