Feeling Sick After Drinking Caffeine - Need Advice

I've pretty much cut caffeine from my diet entirely, even a little causes me to feel super sick. Carbonated drinks also tend to make my heartburn act up really bad, so soda/pop is pretty much only on very special occasions. Sometimes I drink caffeinated tea, but I have to pace myself and I can only have one every so often.

I can't stand it and I know it does no good for my insulin resistance. Caffeine triggers my migraines (aura with blindness and aphasia) and also worsens my anxiety. I stick to low tannin low caffeine tea, but in truth when I'm really unwell I just have coconut water and plenty of water with it to help control my migraines.