Hello, I have gone through the query and understood your concern. Firstly, the female urethra is short and hence, is easily exposed to infection/inflammation, especially during a rough intercourse. Most often, this is relieved by urinary antispasmodics and urinary alkalinisers. Antibiotics are rarely needed. You can get a urinalysis to exclude infection and take the help of your health care provider. Secondly, the first 2-3 cycles after initiation of a hormone contraceptive are not safe as there are chances of continued ovulation and hence, additional protection is needed. Hope this helps.