I just want to make it clear that I'm not denying what you have. All of these are valid conditions/statuses. All I'm saying is that their coexistence makes perfect sense to me without there being any underlying condition. "Something is definitely up" is not necessarily true. Whilst those coincidences are worth investigating, I really wouldn't be so sure that there's a core issue linking them.
By the way, even "true" gynecomastia can be pretty normal. It appears a lot in teenage boys, especially if they are on the fat side, because their body over-converts testosterone to estradiol. It is said that in the vast majority of cases, it subsides by the end of puberty, but it is also said that it can remain that way, and not be a true indication of anything, right? In other words, in my book, it's "normal" albeit rarer.
So yeah, I just wanted to say... Don't worry. I think the most likely situation is that you have nothing of concern.