Please advice me if there is any possibilities to enlarge breast @19?

Implants?: There are multiple risks and benefits for every surgery and breast augmentation is no different. Consult with a board certified plastic surgeon to review your specific concerns. Also, realize that you will most likely need additional surgery in the future to deal with the implants. Saline implants are approved for women over 18. For silicone you need to be 22.

Breast enlargement: Of course garments/bras can be used. There are several other techniques to enlarge the breast with breast implants being the most popular. Either saline or silicone implants can be used. Other methods include external expanders (brava device) or fat tranfer via grafts or flaps. A variety of hormones can be used but are generally not sufficient. Meet with board certified plastic surgeons to assess.