You inject E3.5D right? So monday morning and thursday night, meaning you're at 48-54 hours post injection and trough would be 84 hours post injection. There can be variations in those 36ish hours, I had 1150 48 hours post and 914 72 hours post injection. I do E3D. This is just anecdotal.
AFAIK "roid rage" in and of itself isn't caused directly by high testosterone, it's from high E2. I don't think your sudden anger is caused by the TRT though, and it seems like within the past month, something major has changed in your life.
I say that because, a 4 point increase in HCT is pretty large for one month and with the change in test and E2, it's just so sudden. Did ANYTHING in your life change? A new supplement, medication OTC or Rx, new anything? The anger too is an odd element as well that's new it seems.
Regarding the red cross, you're right they don't directly check HCT, but with high HCT generally comes high HGB(unless you're dehydrated then HCT is artificially inflated) which is what they test. At 18.7 I'm pretty sure they won't accept you but I'm not positive.
Honestly, this is fairly complex and I do believe Dr saya or his staff will figure it out. Something had to have changed, whether you are aware of it or not, so I'd try to think about anything that you've done differently in the past month.
Hope you figure out what's wrong.
Did you get a prescription refill or anything?