Is this normal?

I've taken buhner herbs in the past with little to no issues like up to 10-30 drops even of sida at first and nothing. When I switched to woodland essence brand I was still ok until I tried sida acuta and couldn't tolerate it at all. Is it normal to not be able to ever tolerate an herb? Also now days, it seems like I'm having reactions to all the herbs which I didnt before and I'm wondering why?? Seems I cant take anything or 1 drop of any herb is now causing reactions but not previously. Why can thos be and has it happened to anyone else? I'm starting to give up trying out herbs. I cant even touch oregano oil, it seems knotweed it making me tired now or gast heart beat at first and it sure if it's a herx off 2 drops bt idk. Milk thistle which I previously had no issues with made my heart rate go up and I felt flushed and also wormwood tea made my heart rate go up and I felt spaced out with very little anxiety. Even the vit b folate activated enzyme form methyl form for MTHRF gene that I took seem to make my heart rate go up and feel brain fogged. It did have l-leucine in it which it didnt list in the ingredients upon ordering so that got me mad as well. It is an amino acid and I am sensitive to amino acids as well they give me anxiety and get the heart rate up? Anyone else sensitive to amino acids?? Like what gives

Yes, at first I could tolerate more things and didn't react as poorly to them. As I became sicker, and more endotoxin-laden from antimicrobials, and more overloaded by taking so many things at once, my system became very reactive. I think the extreme stress of a disabling and mysterious chronic illness contributed as well. This is how my MCAS developed, as well as chemical and mold sensitivities. I had to scale way back and address the hyper-reactivity by minimizing what I was taking, addressing MCAS, bringing down my overall inflammation, and doing DNRS and other nervous system-related treatments. These things helped enormously with my everyday functioning and wellbeing.