Three-finder side swipe between apps lagging, swiping up for mission control and then side-swiping produces no lag
Posting this as an answer so that it's more visible.

I'm going to detail exactly what I did even if the steps seems unnecessary. 

I switched between the two accounts a couple of times, noticing that the 3 finger side swipe between spaces wasn't working on my normal account but was working on my test account. I decided to duplicate my normal account and was reading about how to do this on my test account. I started up the migration tool and went through a couple of steps before running into an error. At this point I switched back to my normal account and the swipe was working again.