Tonight is day 18 though I was having humidity issues about 4 & 7 days ago. Unfortunately I didn't weigh the eggs (this is my second ever hatch) but we do have a small digital scale we'll try to implement next time (were going to do it this time then forget several days in). Humidity currently is about 61-62%.
I had ~50% hatch rate on my first hatch, this is my second. I am by no means an expert...;-] If you have original egg weights, I would recommend weighing tomorrow morning, even tho its supposed to be lockdown. If you haven't had enough weight loss, you can still help them during the lockdown. If you don't have original weights, don't bother weighing them, go with your plan. Did you candle?
Honestly, you sound so much like me...;-] I just watched the numbers on the top of the bator and made sure they held true to the instructions...so see it thro.