It sounds to me like you have learned some valuable lessons from all this. It also sounds to me like you have a better idea on how to use dmt (and hopefully other drugs) properly. Don't get upset at what others say, there's a reason you received the type of response you did. Which is because what you did was reckless and irresponsible. Sometimes people can get irritated after having read hundreds upon hundreds of posts by people not using their heads.
Take with you the lesson and the info that you request. I hope you won't be wasteful with yourself in the future and I mirror others thoughts on tolerance... There basically isn't any shortly after you dose. Using other drugs in conjunction with dmt may mimic tolerance buildup.
"Energy flows where attention goes"
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