I had a mirena put in November 2004 and just had a replacement put in two weeks ago since my 5 years would soon be up...I noticed the last 2 years that I've gained 20 lbs for no apparent reason, even when exercising, I have lower back pain that keeps me up during the night and I feel bloated all the time - I also have had extreme mood swings that I cannot explain and I'm depressed for no reason at all - my 2nd mirena has been in 2 weeks now and my breasts are so sore - I've had a headache too - the hair loss has not been extreme, but my hair has thinned. I'm contemplating having it removed since I don't feel myself at all...