Keep an eye on it if it cracks your screwed. I have put boiling water in mine (before adding grain) and not had any issues. If you got it at home depot maybe they will take it back, you would just have to reassemble everything.
It will most likely be fine. I have the same cooler and it developed a bubble that runs vertically nearly the entire length on the inside and is raised about 1/2-3/4". I've brewed probably 60+ batches with it like that and it hasn't cracked or gotten worse.