Yes they sound underdeveloped but im sure you can fix them.
At 21 your past an adult its extremely unlikely your breasts will change alone unless you get pregnant or fatter(not really recommended unless that's what you want or your underweight) and your on birth control thats much more dangerous than herbs don't worry you sure can take supplements and you may need some if your underdeveloped bovine ovary seems to have most success for tubular and underdeveloped or you can use a little natural progesterone cream helps to round them, breasts massage is very important too but most people can't grow much from that alone maybe if they use it with a pump its more likely.
You could use a niplette to shape your nipples if that's what bothers you most they are expensive but work best.
At 21 your past an adult its extremely unlikely your breasts will change alone unless you get pregnant or fatter(not really recommended unless that's what you want or your underweight) and your on birth control thats much more dangerous than herbs don't worry you sure can take supplements and you may need some if your underdeveloped bovine ovary seems to have most success for tubular and underdeveloped or you can use a little natural progesterone cream helps to round them, breasts massage is very important too but most people can't grow much from that alone maybe if they use it with a pump its more likely.
You could use a niplette to shape your nipples if that's what bothers you most they are expensive but work best.