Hi Romania, it looks like you have a cbs upregulation( google is your friend). That is why you can't handle the sulfur. It could also be why you have the kidney pain. The cbs upregulation causes ammonia to build to up and cause problems for the kidneys. To much protein will also be a problem.
I have one and can't tolerate any sulfur supplements. My eyes go yellow when I take NAC. I also have a lot of kidney pain. Mine was confirmed with genetic testing. I did the Yasko panel.
If you do have one you should stay away from all sulfur, especialy sulfites . Whatever you do don't go near DMPSA. It looks like you might also have problems with being an over methylator as well. I also can't take any supplements that cause methylation.
I am finding after many years that simple diet and mineral rebalancing is probaly the answer for me because I am so sensitive. I was very impressed with the results I got from ARL hair analysis labs and am about to follow there suggested program.