I discovered at my initial dose (200mg of Testosterone Cypiate every 4 weeks) bad things happen. Cypiate has a half life of 5-7 days. After that point, only 50% of it is effective and available. By day 10 all of my symptoms returned:
- insomnia
- memory loss
- fatigue
- shadows and full on BEAST attacks
My physician discovered that the current protocol for TRT is 100mg EVERY WEEK with a small dose Aromatase Inhibitor (controls estrogen).
I changed protocols and now I am free - all the time - of shadows and beast attacks. I sleep great 6 of 7 days a week and I am always in a great mood with lots of energy now. I have not yet started on the AI, but I probably will after next visit to the doc.
I do believe that the HPTA (Hypathalmus-Pituitary-Adrenal Axis) is broken in those of us that have clusters, with the hypathalamus being the biggest culprit. Any damage to that and hormones go nuts - not JUST Estrogen and Test, but thyroid, D3, Melatonin, Cholesterol (the precursor from which all hormones originate), etc etc
Getting a simple blood test is not enough to see all of these - they need to be sensitive assays on all of the hormones you think may be out of whack. Have the results sent to you AND your doctor so you can see them too. Your symptoms outside of the headaches can help point you to the hormones that are problematic.
This is Day 14 for me, pain free. I'm a little tired(only got 7 hours of sleep, not my new normal of 8), and occasionally might feel what could be a k1, but its fleeting. It's also my injection day, so tomorrow I will be fine again - back to 8 hours solid sleep and a kip of -5

I encourage all of us to thoroughly explore your complete hormone panel. Also keep in mind the ranges of the results.
For instance, a range for Testosterone (Total) is 300-1100. This range is counting a population of 16 year old boys and sick 80 year old men. Labs will say you are in the "normal" range if your levels come back at 350, or 400, and the doc will parrot that. But we all know that's low, and you likely used to have levels at the 800 or 900 range just half a decade ago.
For instance, my Vitamin D3 came back at 37 on a range of 30-100. Said it was perfectly normal, but it's on the border of below range. So make sure you check your test results and insist on getting everything in the proper range (which means tweak until you feel positive results).