Talk to Gynecologist on Hormonal Change And Absence

I am 21 years old. My periods sometimes come after 2 months, but when they do come, they last for a normal number of days. I also have facial hair growth, which might be due to this. The biggest issue is that there is a significant difference in the size of my breasts. One is smaller, and the other is larger, and there is also a difference in shape. Is this normal, or do I need treatment?