<human>: Can you provide a brief rundown of the text in within 3 sentences?

Last weekend my husband and I went to our local running shop and got (much needed) new shoes.  My old pair are Mizuno Wave Rider 16's, but after trying a bunch of pairs on (I have weird feet apparently, they are insanely narrow) I came home with the Adidas Boosts. 

 I have enjoyed them, but on the few runs we've done where I've worn them, I have struggled some...my legs are just getting tight and uncomfortable, so I end up being slower than my already slow. They aren't making anything painful or rubbing or anything, I just feel like I've struggled more the last couple of runs (maybe it's luck of the draw?).

Since I am only on my second pair of shoes (yes, pretty new to running, but have done a few 5ks and such, so I didn't think a 2.6 mile would leave me sore this morning), I was wondering:  is there some kind of adjustment period for new shoes (obviously breaking them in, but I mean in terms of your body "getting used to" a new shoe, if it's different than your old shoe) or is this some kind of warning that I've made a $150 mistake?
<bot>: Got new shoes, different than my old pair and have struggled the first couple of runs-- is there a period of adjustment for your body getting used to a different type of shoe, or is it the wrong shoe?