Hi i nomally skip every second period due to the cramps and am on the pill, but a few days ago i started having really bad back pain and started to spot so stopped taking the pill to have a period except this period has been more painful and heavy than any i have ever had before, and there was a large clot followed by many smaller ones, i am needing to change my tampon and pad every hour. Its so painful i dont know what to do, is this normal?