Try not worry about whether it will last, just play and focus on your game. If you put too much thought into the whys of your jump in form, you may think yourself into becoming out of stroke.
I've reasoned myself into a slump before. I was playing the best snooker of my life but at the same time some of worst pool I've played at my current level. It didn't make sense to me, I kept obsessing over it and the moment I had a bad day at the snooker table I went "aha I AM in a snooker slump too!". So instead of just letting that day go and coming back with a positive attitude I walked in hoping my game wouldn't be too terrible each day.
I started to break out of it when someone suggested that I stop obsessing over it and just focus on playing. Just focus on a smooth stroke and thinking my way through the racks.