Hi and welcome.
I don't want to sound negative, but my personal belief is that most of what you are taking/doing is a waste of time and money, I'm afraid ( I'm sure that others will disagree with me!).
I would put whatever changes you've seen down to three things (a) some fat deposition in the breast area, caused by the general herb regime, (b) some swelling caused by the FG, ( c) some increased circulation effects due to the massage.
Unfortunately, none of those three are real breast tissue development and will disappear pretty quickly if you stop. Also, of all of it, the only thing that will potentially affect one side rather than both, is the massage.
There is undoubtedly some very mild estrogenic activity in some of the ingredients you list, so if you take enough for long enough, you may one day start to feel the small knots behind the nipples that we call budding, but until you do its unlikely that you are experiencing real breast growth, IMO.
What you take is a very personal decision and I wouldn't in any way try to pressure you, but PM is the most effective if you really want to grow and at your age ( I'm a few years older) time is starting become important!

The only way to find out its effects on you as an individual is to try it and see. Not all of the negative effects you are worried about happen to everyone - for example, I'd love the bigger butt you are worried about, but after over 2.5 years on PM it just ain't happening!
The homemade cream is unlikely to do anything other than moisturise the skin, which feels nice but that's about it.
At your age the SP is probably doing nothing, anecdotal evidence suggests that it becomes unnecessary by middle age, if not before.