You've probably heard by now, but a Meta bug decided budgets are for chumps over the weekend and went all in like a drunk kid in Vegas.

Per Social Media Today:

Some ad buyers reported CPMs up 200%-500% versus the previous day, while all ad performance metrics were seemingly affected. Other advertisers also reported their ad sets well exceeding their daily set budgets, with no way to limit the damage.

It's too late to do much about it now, but if you can find a Meta rep you can request some credits to make up for it.