Do I have a fungus/spider mites?! Help!😫

These JUST appeared in the last 4 days. I fertilized on Wednesday and none of this was Wednesday. I’m really hoping it’s just irritation from the concrete beam bc so much dust and concrete is on top of that beam. If it is, any recs on keeping it contained!? Literally any advice is welcome at this point😫🫶🏼 tyia

Water when the top two inches are dry, it has a ton of drainage in the bottom, repotted 2/16, & it gets bright indirect light all day long