Your #2 is exactly what I’m experiencing now - like a marble sized lump that’s like a pimple but without a head. Today I’ve found it a little uncomfortable even to sit on a wooden chair at work. So annoying! I’ve been going to town with using chamois cream during rides (dz Nuts), and sudocreme and/or antibacterial cream during day/night. I ALWAYS ride with a clean chamois/bike pants and shower straight after. Repeat - it’s so annoying!
So you just kept riding and it went away? I’m wondering if I need a half or full week off bike as riding through it today seemed to make it get bigger. I’m feeling pretty stressed about it!