im sorry but i just dont believe you.
i think that because of this horrible condition some of us, myself included are very self consious and as such spend a lot of time criticising ourselfs over very minor or maybe non existant flaws. im not saying that you dont have gynecomastia just that sometimes we tend to exagerate things that we already see as negative's. Besides if cannabis was making your gynecomastia worse i imagine that the process would take a matter of weeks/months even. The likelyhood of it happening overnight is extremely minimal.
J