Not sure what to think or do..

La'Nita
AF was due on the 16th. No show..I tested on the 16th, BFN.. As of today, AF is STILL a no show, and I don't have any symptoms of a period at all..Only thing out the ordinary, is I've been sleeping a lot. We're TTC baby #3..not sure if I should test again or wait to see if AF shows.. What should I do?