"hey everyone i am 22 years old and i just started my 3rd week of this pill. this is the first time ever being on birth control. i started the first day of my period and i&#039;ve been spotting where as i actually need to wear a tampon basically ever since. i have lower back cramps from time to time too. before the birth control i had lower back cramps whenever i had my period and it&#039;ll last for 7 days. now i&#039;ve been spotting for about 8 days. i say 8 but i haven&#039;t stopped bleeding since o had this last period. but this bleeding don&#039;t seem like period blood. someone help me please .should i call the doc or wait until the next period (end of month)."