It seems like I'll be in the minority saying this, but I don't think you should be smoking or vaping DMT.

I question the idea held by many on this forum that there is nothing to fear on the path of smoalking DMT if you could only let go and merge with it. The idea to "just do it" in spite of oneself. I personally think that smoalking DMT is something our bodies aren't physically adapted to do, and although it can be a wonderfully transcendent and life-affirming experience, I think there are other, safer, more holistic methods of acheiving well being, or exploration, that are more harmonious with the body.

Dry heaving sounds like you would need to mix that DMT with harmalas, and drink it. Or like I said, simply not do it at all.

I personally would choose to listen to my own body and emotions over some notion held by people you don't know that all will be well despite your violent reactions.

Though, I do think it's a good idea to alter the setting like you did and start at lower doses, that is if you really are dead set on putting DMT in your lungs.