What should i do?

okay... last month.. i had my usual period.. and it carried over until the first week of february... then 2 weeks later i started again... and im still on it (tomorrow will be 2 weeks ive been on it)... i have been messed up since i had first started and im almost 17.. my grandma was messed up like this and had to have a hysterectomy.. and my mom did too... so what am i supposed to do? i have felt like crap for the whole time ive been on it...And the doctor cant do a papsmear when ur on your period? So can anyone tell me what to do? Im on birth control and the doctor said it would help with regulating my periods too.. but it hasnt..