Hi Rachael,
As your breasts have'nt changed I would have thought the estrogel was a red herring.
I'm not a fan of the medical term 'gynocomastia' as that is all too often associated in peoples minds as 'man-boobs'. The bane of the elderly, overweight and those who have undergone an idiosyncratic puberty!
If your breasts are more orb shaped and crowned with female nipples then I'd certainly consider them breasts and you can consider yourself one of the fortunate few ;) Whilst just about an A cup I would'nt swap them for the world.
I am a little intrigued that you can hide a B cup with baggy clothing. Even with baggy clothing it's fairly obvious I have breasts...
I get the impression you've had them for some time so the following probably does'nt apply: Liver damage, some cancers and some medication can cause feminising in males and breast developement. [So if anyone out there wakes up in the morning with a very well endowed chest, yahoo! is'nt necessarily the first thought you should have...]. I'm assuming you have no other medical condition which would have an impact on your body.
If things are as you say, I'm surprised you have a problem with body hair.
I would be curious to know if yours meet the criterea I mentioned above. Feel free to email - PM's don't like me - 'cos at the moment, to be honest, I'm still in a minority of one.
www.raekelcou.com