So I had this silly idea of sticking cotton in holes of the case of my phone. I also didn't realize there was a recording volume option in the recorder app I use, so I set it to 50%.
I played some music really loud from my music setup at home, and stuck both sides of the mic to the speakers and sub at a loud volume, and no distortion. It is a little bit low, but I'm sure I can fix that in editing afterwards!!
I am excited! I'm going to the (G)I-DLE Show tomorrow, I hope the recording is better