 [ Symptoms ] my pain in lower part and delaed of minstraution without any sign of pregnancy hello everybody  anybody could help me for a certain facts that i have at the moment its been how many days that i am suffering from huge pain in my lower part lower back pain sometimes fever and also i am very delayed in my minstrautions for already almost two weeks and always have to urinate at night but i dont have any symptoms of pregnancy so i dont know exactly whats going on and bcos of that i am depressed couldnt sleep well and too much worry may i know what is this  [ Disease ] the answer is yes the only form of birth control that is 100 effective is complete abstinence the effectiveness of the pill is very user dependent typically about 8 women out of 100 that use bcp is will get pregnant during the first year of use however when used as directed only about 1 in 100 women get pregnant remember that this degree of effectiveness with the pill depends on you taking the pill exactly as directed and at the same time of day every day abnormal or breakthrough bleeding is common during the first few months of use and its very normal this typically is just an adjustment that the body needs to make to the newer levels of hormones the duration of this abnormal bleeding pattern depends on the type of bcp you use and often can last much longer in women taking continuous dose pills to ease your mind get a pregnancy test done many over the counter tests can detect pregnancy as early as 6 7 days before a misssed period also remember that bcp is do not protect against std is so if you are sexually active use a backup method like a condom