You got Mirena in May and am still bleeding heavily and have really bad cramps is this normal?

I am sorry to hear that you are having a bad time with the Mirena. I too had the Mirena and experienced the same issues as yourself over an 8 month period. It turned out that I had several oversized Fibroids and the Mirena did not help with the stemming of heavy bleeding. I had my Mirena removed and subsequently the Fibroids - best thing I ever did. I know they say it can work instantly or may take a couple of months, but it depends on how long you want to continue with things they way they are. Good luck with which ever dicision you make.