What are the side effects of large doses of estradiol?

i'm a 21 yr old biological female.... im a bit of a hypochondriac and i know a lot about medications.. i usually self diagnose and self prescibe (yeah i know its bad. no lectures plz).. im thinking about taking 1 mg /day of ethinylestradiol to increase my bra size from an A cup to a C cup. 1 mg is about 50 times the normal dose ( e.g. 0.02 mg is the amount in the birth control pill ). i will also take the birth control pill (yasmin) because i know i need a progesten since im premenopausal and i dont want to increase the risks of uterus and ovarian cancers... are there any other risks ??? thanks :)