This thread scares me. I used to get cluster headaches and severe migraines all through my childhood and early adulthood. I use mushrooms, LSA, and Salvia to treat them, and now they've completely faded. I just recently started smoking changa, in rather small, sub-threshold doses. There's been something holding me back from taking a full breakthrough dose. This just lends itself to my cautionary state of mind
The small tokes of changa that I've done over the last little while haven't caused me any problems, and I am a sufferer of cluster headaches. They are much more than a pressure in your head, it's like a vice is squeezing at your temples, and there are ice picks on the end of the vice. The pain radiates through your temples, behind your eyes, it's literally blinding. And they come in waves, attacking, receding, attacking, receding. The migraines I experienced weren't as intense in pain, but lasted for days at times. I'm very thankful that I've found ways to treat them without pharmaceuticals, because the pills I did try didn't work, and gave me terrible side effects.
I guess I don't have much advice here

But I do wish you the best. Try staying away from it for a while, or taking smaller doses, and see if it continues to effect you. I really would not want to experience a cluster headache at the point of orgasm, that would almost ruin the entire experience. Smaller doses of DMT or perhaps a good trip with some LSA seeds or mushrooms. They have worked wonders for me.