Blood test shows estrogen levels are very low but still experiencing some gyno symptoms in one side of chest. Small lump and very mild sensitivity. Current protocol is low dose of test e with .5 Adex daily...thinking of switching to letro??
Or could progesterone be an issue? Even if test is the only thing being uses? In that case caber/dosinex could be the solution (not on hand at the moment though)
I don't think it's a problem with your AI. The arimidex should be a sufficiently powerful compound. It definitely seems effective since your estrogen levels are low. In other words, I don't think switching to letro or another AI will help.
With regards to prolactin-induced gyno, I thought that was usually only typical of the dienolones (e.g. tren, etc.). I'm not certain on this point so someone feel free to key in. I know it's possible to get prolactin gyno with regular test, but only because it aromatizes to estrogen. But you should have that issue fixed with your AI. I don't think a dopamine-receptor antagonist (e.g. caber) will be a good solution.
Could you describe your sensitivity? Is it just sensitivity or pain? How large is the lump?
Also, what's your test dose? How long have you been on it? When did you first notice the gyno?
Are you taking anything else like GH, peptides, etc?
Anyway, if all else fails, you're certain it's gyno, or you're freaked out, your best bet is to probably eliminate the source of the problem: the AAS. There are other options, but just remember you can always do that if all else fails.