Hi Kari,
I understand your frustration when you journal isn't exactly clear. I'm on step 6 and I'm still not sure if my mood is affected by today, yesterday, or 4 days ago. Earlier in the program, I was pretty sure that my BE crashed within 24 hours. Because I always felt really cranky on the night that I exercised that morning. Maybe being around the horses is spiking your BE, and you're coming down quickly?
You also mentioned the late dinner, and that would certainly do it for me, too. Were your meals on time on the other Tuesdays when you felt bad on Wednesdays?
The other thing I wondered is maybe it's something in your sinus spray that you're reacting to?
I do know that my food allergies create crankiness in me; but I'm not sure it would be the same for environmental allergies.
Sorry, I know it's frustrating to try to be a detective sometimes.

: I am so angry I am scaring
: myself.

I've definitely been there. I hope you can figure it out.