I went through a similar experience the first day back in the office with a shaved head. My heart was thumping in my chest as I parked up & strolled through the car park to the office entrance. The security guards recognized me immediately & one of them gave me a knowing nod.... he was a bald guy, too.
When I got to my department a few folk almost didn't recognize me.... Most comments were positive, but the occasional one was a bit negative or derogatory. I ignored the negative ones and thanked others for the positive comments. About 2 -3 months later, I noticed a few other guys coming into work with shaved heads.... Think I started a little fashion trend amongst some of the guys. Lol !!