Hi doctor, I'm a girl and I'm 18 years old. I want to grow my breast size. I've read about a man drink tea that includes: fenugreek, fennel seeds, saw palmetto, wild yam and his breast size has gone from 38" to 43". Will that recipe work for a female like

Not likely. Careful!!! You might get big, heavy, hanging breasts. Look at older women and notice how those with smaller breasts look so much better. Pregnancy, obesity, and certain hormones can cause big, clumsy, unsightly breasts.
Breast size. can change with changes in your general body weight/habitus, but otherwise there is no natural way to increase breast size.