It sounds to me like you are caught midstream; let the current flow, it will take you where you need to go.
I get a very powerful vertigo just contemplating the infinite, and this bewilderment, tinged with terror, is often worse in the days, and sometimes weeks following a strong trip. Do not underestimate the power of these substances, of which DMT is certainly at the top; they confound as much as they elucidate, and when you learn small sketches of truth, one of the first things that is learned is that confoundedness is merely the underside of elucidation, chaos the reflection of enlightenment.
You are correct: nothing matters and everything matters; once the curtain is lifted, we see the illusion for what it is, and we understand that through its very nature an illusion, being unreal, is void of real consequence; conversely we also intimate that this illusion is all we have for the moment, so there is nothing that can matter more. The stakes are as high as you make them.
Holding both of these ideas at once is the great juggling act, and I can tell by your post that you are watching the balls in the air; you need to recognize they are there, but forget the juggling and look beyond that which is juggled - as any good juggler knows, it is the moment of "juggling" awareness that takes the juggler out of the juggling, and causes the hands to falter and the balls to fall...
You are right also in saying that you cannot go back; give it time though, and let things be as they are, and you shall wonder why you ever wanted to return to your old mode.
All different ways of saying what people 'round these parts like saying, and what you intuit: that you are "on the right path" and need time to "integrate".
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And BTW, while ignorance may be bliss, true wisdom is peace; give me the evenness of peace over the fickleness and caprice of bliss any day.
Cheers,
JBArk
JBArk is a Mandelthought; a non-fiction character in a drama of his own design he calls "LIFE" who partakes in consciousness expanding activities and substances; he should in no way be confused with SWIM, who is an eminently data-mineable and prolific character who has somehow convinced himself the target he wears on his forehead is actually a shield.