3 week long period!!!!??

Jane
IVE BEEN ON MY PERIOD FOR THREE WEEKS!!!! I'm about to start my third pill pack. last month I had my period for two & a half weeks so I went to my doctor. she said I shouldn't worry, and that it takes 4-5 months for your body to adjust to the pill. she also said to start my next pack right away without a break. now this month, I've been on my period for three weeks. im in a lot of crampy pain & heavy flow all three weeks & it's not letting up. has this happened to anyone else before? please help😓