I have similar, but maybe a bit different. For me, my hands and limbs start to tingle and it FEELS like I am about to have anaphylaxis, and then thank God, I don't. I have had episodes in past and they were awful. they only stopped when I stopped eating the rice because I was being poisoned with arsenic. Lately it's happening again and other, gastritis etc. I am so tired and so scared. My life has been turned upside down because of these metals.