UPDATE!

I took my BP in to be seen and we discovered a few more little dark spots, and some of them are freckles, and we came across a few small, minor patches of burned scales. It appears that he burned himself on the under-tank heater, and moved away, so it started healing and isn't inflamed or anything. It's not a serious burn, but I've since taken steps to prevent it from happening again. Added several inches of bedding so he's not so close to the glass floor [thankfully he doesn't seem like he likes to burrow at all], I also lined the bottom glass floor with a couple layers of paper towel to provide a bit of a barrier, along with the about 3.5 inches of bedding.

I'm also looking into ordering a thermostat for the heat mat. Because even I touched that glass with my bare hand and it was definitely hot! I feel terrible, my poor baby. But I'm taking the steps to correct my mistakes. Hopefully with a good shed his scales will be back to normal!