Ohhhh.
First proper stomach cramps are hitting.
Officially in nicotine withdrawal.
It hurts.
However, it's late and I will sleep soon.
Also, I have good pain relief available to me.
So I'm going to take some ibuprofen and paracetamol.
I don't remember the last time I felt so determined to do something. Long may it continue.
@stueytheround
Nicotine is a poison that attaches to receptors for acetylcholine, and acetylcholine is used to activate nerve cells throughout the body. Your body has been defending itself against that poison by reducing the number of nicotinic receptors -- but when you withdraw the nicotine, you will be getting an underdose of acetylcholine until the receptors grow back. That takes several weeks. But you will notice symptoms lessening as they do.
https://www.atsdr.cdc.gov/csem/cholinesterase-inhibitors/nicotinic.html