Mortgage rates are about an eighth of a percentage point higher than a week ago. In the last two days, your lender probably has either raised rates slightly or is charging more for discount points. That makes refinancing less attractive.
This isn't the result of a bait-and-switch scheme. Mortgage rates are volatile. They've been known to move a quarter of a percentage point, or even more, in an afternoon. Certainly, it's not unusual for rates to rise an eighth of a percentage point in a few days.
Rate movements have been relatively tame in the last year or so. Mortgage rates definitely move around these days, but more slowly than during boom times.
You probably feel disappointed if you thought about locking a rock-bottom rate early this week, but hesitated. It's possible that rates could fall again, but it's more likely that they'll continue rising.
What should you do? I don't know. Tuesday and Wednesday I urged people to lock. I was decisive then and indecisive now.