25mg is a HUGE dose. I feel for you, ive actually administered 5-meo-DMT in the same fasion, but only at 5-10mg , and 10mg was way too intense for the duration that it lasted!
I found it a good method, but I preferred rectal dosages, for the slower onset, and less of a dosage curve! Things get way out of hand if your off just by couple milligrams.
You have to take into account bioavailiblity of the substance with SC and IM injections, im not sure of the numbers... but usually the case, it IS 5x as much absorbed as the intranasal route, and certainly MUCH MUCH faster, since its such a small amount of drug.
5-Meo-DMT is a ruthless beast. But the lesson it taught you will sure stick with you.
Expect nothing, Receive everything.
"Experiment and extrapolation is the only means the organic chemists (humans) currrently have - in contrast to "God" (and possibly R. B. Woodward). "
He alone sees truly who sees the Absolute the same in every creature...seeing the same Absolute everywhere, he does not harm himself or others. - The Bhagavad Gita
"The most beautiful thing we can experience, is the mysterious. The source of all true art and science."