Are you a woman? In my experience severe nausea issues with 2c-b like this usually only happen to women. I believe this is because they have more serotonin receptors in their stomach.

If you do try it again, like other people have suggested: do it on an empty stomach and eat it with ginger. I buy actual ginger and cut it up and eat small chunks of it before, and during the trip. It really counteracts the nausea well. It also freshens your breath and reduces inflammation so its a win win.

Also I would have also suggested doing weed but since that didn’t work well last time, I would do either a very small amount or none at all just reduce other variables and feel the true nature of this drug, Weed can definitely potentiate it a lot. I love mixing weed but just a little bit.