That sounds very similar to my rectal 2C-T-2 experience. Alerts in about a minute, peak by 10, vomiting by 15! There is no reduction in body load ... which makes sense because the nausea of 2C-T-x's seem highly correlated with the plasma concentration.
YES, rectal dosing increases nausea!!! And it shortens the trip ... to a nearly useless level. I'll admit, for low dose recreational trips it could be great, but there are many more problems with rectal admin besides the fact that you have to stick a drug where the sun don't shine.
Nobody listens when I mention the pharmacokinetics of rectal admin!!! It seems so much shorter because of the abrupt peak and steep drop off. It's meaningless to say 14 mg rectal = 40 mg oral or whatever. A better comparision would be 14 mg rectal = intensity of 45 mg (oral) peak for 1 hr, then peak of 30 mg for 2 hr, then 20 mg and so on. The pharmacokinetics is completely different. I posted a graph in the rectal admin thread, but I'll repost (EV is similar to rectal or insufflation). Once you're down to a trip that feels like 20 mg, you consider it pretty much over.
With oral dosing, absorption continues to occur slowly as the drug is degraded creating a "plateau," whereas all of the drug is absorbed very quickly with rectal admin, so all you have left is a downhill slide.
Read the above!!! Rectal admin seems to be something of a "fad" on this board recently. I have nothing against it, but people just seem to be doing it because everyone else is. Consider the reasons your sticking things up your bum! Is there really anything positive to come of it? Again, if it is a low dose recreational trip, or some other recreational substances like cocaine or opiates, then it is probably optimal. But for psychedelics, oral is superior. Period.