Why do my armpits sometimes exude a marijuana odor?

I'm allergic to pot. I don't do it, and I keep it away from myself to avoid the allergic reaction that it causes. However sometimes (usually) when I'm really stressed or unhappy, I start suffering light allergy symptoms, and people around me will point out that suddenly my armpits reek of pot. Often the change is gradual enough that I don't notice unless I stick my nose down there and sniff. Taking a shower helps a bit, but after scrubbing thoroughly, sometimes my armpits still reek. Normally I don't use products on my armpits. Usually people like my natural smell, but I do use raw scent amber when I'm going dancing (not often the last few years). Lately, when the pot smell creeps in, I've been using small amounts of lavender or tea tree oil to help bring it under control so that I don't have an allergic reaction to my own body. Do you have any idea what causes that particular smell, and if there is a a way to prevent it happening? If I try searching on google I find a handful of other people asking the same thing (who also don't smoke) being told by stoners that its from smoking too much pot. Which is clearly and blatantly untrue in my case since I can't even have the raw plant near me, let alone the smoke. Any light you can shed would be greatly appreciated, and if you haven't encountered it before I would even be willing to try to get you armpit samples. I really want to know why this happens so that maybe I can prevent it.