Yeah I do that then end up thinking with my dick and risking a crap punt.
That's the big risk of same day punting, especially when the prossie doesn't crawl out of bed and turn her phone on until 11 in the morning.
I try to arrange the day before, 24 hours ish, and have a list of prossies who look good, if plan A doesn't respond by the evening before the punt then time to move on. Occasionally I've sent emails to a few prossies asking if they are likely to be free the next day without actually making a booking. Checking these the next morning shows just how many don't respond and thus would be difficult to make arrangements with or only deal by text (a bad sign most of the time). Many don't respond weeks after when I cull the crap out of aw.
OP, if you are booking way ahead and she doesn't reply after 2 days then she's unlikely to. Even if it does take ages for her to eventually get back to you you've got to ask what it would be like on the day of the punt when you want her address. Have your list of candidates and don't pick the next best when none reply.