((Hugs))
Its ok! It's hard to figure these LOs out sometimes! We all feel like this once in a while! It WILL get better!!
Let's try to help you out.
I have been told by other wise women on this forum that yawning can mean one of three things...
a) they ARE tired and need to go to sleep
b) their body is just responding out of habit to when it was used to going to sleep, but can be pushed further
c) they are bored and just need a change of scenery
Based on the fact that she gave you an UT nap, I think you can rule out the first one.
I'm thinking this is what's happening...
her first nap is an UT one (hence it being 47 mins), that means the next day (assuming all things equal to the day before, same kind of night, relatively the same amount of night sleep) you can extend her A time longer.
Because her first nap was UT she didn't get enough sleep to fully restore her little body and then progressively became OT as the day went on. By the time you hit that last nap, she is in full blown OT.
When you start the next day and she yawns early, change her scenery/activity, take her outside for a bit, or do what you can to see if you can gently extend that A time. Then based on that nap length, adjust your day accordingly.
If she gives you OT nap, try extending it if you can. This will take time, but if it starts to work (over the course of the week), it's one more tool in your toolbox for helping your DD get more sleep in a day.
I find it helpful to get into my LOs room as soon as I hear her wake up as it takes less time to get her back to sleep, then if I wait and let her really wake up and cry. But that's just me, some other ppl wait to see if their LOs will resettle themselves. If my DD is OT, she won't. She needs help.
Hang in there, you're doing great!!!