What have you tried for your gut before? This is probably the best place to start.
I've done the daily carrot salad or mushrooms fried in coconut oil for a while, but neither help. I think my gut issues are beyond what these two can fix, as I usually still feel food sat in my stomach two-three hours after eating - especially if I'm at the gym lifting. This again suggests hypo, but my poor reaction to thyroid-s leaves me out of options for this, unfortunately.
Are you familiar with Flucloxacillin at all? It's penicillin based, but I can't find any info on the forum regarding it's safety vs VK and the other frequently recommended antibacs.
Could be yes, and low blood sugar with an increase in adrenaline to compensate. If neural sympathetic activation is low (which is necessary to prevent hypoglycemia), then adrenaline needs to step in to raise blood sugar, when then causes the stress reaction.
How would this issue manifest on serum glucose levels? My blood glucose levels have been hovering around pre-diabetic territory recently. Two hours after meals it is often ~6 nmol/L. I have a glucometer so I check semi-frequently. The issue seems to be worse with starch, or high fat meals. Sugar alone in the form of orange juice or coke doesn't seem to cause the same glucose elevations.