Normally you start tripping at about the 30 to 45 minute mark.
Some time dilation takes place, where you feel like you've been tripping for ages at the 1 hour point.
Frequent yawns are a good sign of the next wave being ready to start.
Next time don;t toy with them either, compress it as much as you can, take a slice of hot pizza, fold the shrooms in the pizza, give it a while for the oils to draw into the dry shrooms to make it less...dry, then eat it quickly.
P.S. lay off the pot till well into the trip, say 3 hours... it can make a trip go dark very fast.