Vomiting 2 days post FUE op, can I damage grafts?

If you are having issues after surgery, especially with "vomiting" you should contact your doctor.

By two days postop, it is not likely but not impossible that you may have dislodged some of your grafts, depending on how forceful you vomited.  If you don't see any of your grafts protruding out further than they were before you got sick, or grafts that fell out, you're probably okay.  If you're concerned you could ask you surgeon to assess the area.

if you got sick from something you ate and developed vomiting 2 days post op, I would think that the grafts should be fine