[nmotz]

Her behavior sounds pretty normal prior to laying her eggs. I wouldn't worry about it. If she does let them go, try to take them out of the tank because they could foul the water quality. Mantis shrimp larvae are just about impossible to raise for a number of reasons. I know it's probably tempting to try, but many people have and the results just aren't good. Otherwise, just leave her alone, I don't think these eggs are fertilized anyway. She may eat them at some point.