It’s natural and normal to have big puffy nipples after the onset of puberty. Nothing to worry about. If you want to enjoy your life, you have to love your body unconditionally not to hate at all. If you still observe extreme unusual shape, consult some Gynaecologist to rule out any abnormalities.
Also know, when should I be concerned about my nipples?
If your nipples are newly inverted, you should see your doctor. They could be a sign of mastitis, mammary duct ectasia, or an abscess under your areola. If it happens suddenly to one or both nipples, nipple inversion could be a sign of breast cancer.