What are the chances of becoming pregnant ? 

I started my period on a Friday and started taking my birth control on that following Sunday like the doctor told me to . I had unprotected sex the next day, he peed before so it would kill any leftover sperm that was left prior to having sex . And he pulled out before he came . We also done it about 6 days after I started taking the pill too , same concept- peed and pulled out . 

I know the consequences of pregnancy , and have unprotected sex, so no need to badger me ! Just a teenage girl looking for answers .

And also-

Why do I have really sore boobs, nauseated all the time and very watery white cervical mucus while on the birth control?