No problem, what is important is that you got it now
Do try to extract from now on.
For now, check the link in the last quote in my above post.
The safest proceedure to clean up dmt from an unknown source (which one should avoid smoking for the reasons above ) is to:
Redissolve in vinegar, defat a couple of times with warm solvent, re-basify, re-extract with solvent, do a sodium carb wash, freeze precipitate and recrystallize, then re-dissolve in ethanol or pure acetone/ipa and re-evap to remove solvent traces
This would make sure to get most impurities out. If all of that is too much (though it should never be too much considering its your health we're talking about), at the very very very least, do at least 2 or 3 recrystallizations.