I am on my 2nd mirena. the first one expired and was changed afte...

I am on my 2nd mirena. the first one expired and was changed after being in for 4 years...not 5. with the first one, the only side effect was the acne. ive had the 2nd one in now for just over a year and im really considering having it removed because the past 8 weeks have been hell. while i have virtually no period, i also have no sex drive, and my cramps are horrendous. headaches, nauseousness, etc. 8 weeks ago, i had all of the symptoms of pregnancy witch came back negative thru a hpt and a blood test. also had symptoms of UTI, couldn't urinate and when i did it was very little, even had the pain in my lower back which led me to believe the UTI was bad. turns out after 3 cultures, i had no UTI, ive had a cat scan, mri and a scope up into my bladder, everything came back clear. symptoms disappeared, or so i thought. here i am again with all the same symptoms and its right around the normal time i would get my period. could this be a mirena side effect? lower back pain (not intolerable, more of a nucience *sp* ) my back feels like i rubbed BenGay or Icy hot on it. has anyone had these symptoms??? im going insane!!!!!