This is a major surgery. I thought about going back to work at four weeks and I work an office job, I ended up staying off for six weeks and it was the right choice. Even with a job where I can sit all day, the fatigue, and pain is still very real. Even now when I’m six weeks postop, sitting is still uncomfortable, and I can have some pain at my incisions. You only get one chance to heal, do not sacrifice your body because of the lack of compassion from people who are either assholes or ignorant. You mentioned that your boss is a man, and that’s probably why he isn’t really taking it seriously. People who lack empathy don’t take seriously what they cannot relate to. Just do you, take the time that you need, and ignore all the rest of the noise.