[BonitaDDs]

Yes as long as you arent using any hormonal methods even birth controls I think can stop growth its funny mine stopped growing at 13 when I started BC so yes any additional hormones will only get in the way of breast growth at your age so no hormonal herbs or topicals flaxseed should be OK.
Make sure you are a healthy weight not underweight eat more healthy fats less cafene don't smoke really easy be healthy eat fruit and vegetables.
Don't worry about testosterone just yet its normal to be a little more hairy and spotty during puberty unless its extreme then see a doctor.
Massage is great for breast health as well as growth so definitely do that you may also like to try fat redistribution massage easy way is to put in a bra it must have a very tight band size( eg if your under bust measurement is 30 wear a 30 size band or the closest I sew mine smaller)then a cup slightly big lean forward pull fat from armpits and back into the bra cups the cups should look noticeably fuller after, do this a couple times a day. This helps shape and grow breasts it also gets you used to wearing a bra correctly which will benefit growth.
Hypnosis,subiminals and rock melon ringtone are safe and could work for you.