I get some version of this question all of the time, and while you did not give me enough background information to properly address your specific situation, I think this will help:
When a someone asks me “How long should I wait to call them back?” this immediately tells me that this person doesn’t really “get” how male/ female attraction works. If they did get it, then they’d be thinking in those terms rather than trying to figure out the exact best amount of time to wait before calling.
Specifically, the “when do I call her/him back?” problem is part of a bigger concept, and once you understand that bigger concept better then you’ll have an automatic feel for when to call a woman (or a man) back.
Most guys (or women for that matter) don’t “get” one simple point:
If you want someone
.
.