Definitely stay home, OP. Friction from clothing will rub when you walk and make it worse, so get your drawers off and give your foof an airing!
Hot compresses, eg a flannel wrung out in hot water, will help. Also aspirin or paracetamol for the pain.
If you've had it more than a few days, or if you start to feel generally unwell, or you start to run a temperature (especially if you get a temp), try and get a telephone appointment with your doctor. Boils can lead to secondary infections, and it may need draining.
I've only ever had 2 boils in my life and they bloody hurt. I stayed off work with the second one, it was right where the band of my bra goes and I couldn't contemplate going to work with my 36Gs unrestrained. Of course, the movement of the unleashed norks meant that it hurt even more, but it cleared up quickly.
Stay home, and I hope it feels better soon.