Cindy
You shot an 84 yesterday morning with the same dose. Benjamin has already nadired today so this looks like a surf to me. If he does come any lower, it's likely to be a second dip. Because you've shot it before and handled the numbers, if you answered yes to all questions about supplies, rest, etc., and you are comfortable with it, you can shoot as long as this is not a food-influenced number (he hasn't been fed in the last two hours).
If you want to stall, you can. But if he falls more, then he might get to a point where you are no longer comfortable shooting. If you have not fed him and you decide to shoot, then you can feed him and get the numbers to rise before he onsets.
What do you think? Of course, if you do shoot, you absolutely need a +1 and +2. I can stay up and walk you through low numbers tonight if he doesn't bounce.