Mirena Extreme Tiredness, C Section Scar, Muscle Cramps, Taking Pills, Tight Muscle

Well, I have had my Mirena since June/08. I had my son in May/08. I was 7 weeks pp when I had it put in. After my son was born I felt ok, no pains besides my c section scar
NOW...since insertion I have had a mess of problems. I have been a healthy woman for a long time and never had issues like this until July-ish. I am 27.

1. I had horrible back pain and my legs felt like I walked in 7" heels the night before (the tight muscle cramps, etc). My PCP told me I could possibly have a slipped disc and wanted me to go to PT. I had all my blood work come back fine btw. Since I knew in my heart I didn't have a slipped disc I did not waste my money on PT.
2. I have NO sex drive. The thought of sex makes me gag. No joke. I had sex 6 weeks pp and had a libido with no sleep. My son sleeps 11 hrs a night and I still don't want sex. As I type, I could go the rest of my life with no sex. THAT IS NOT ME AT ALL!
3. Extreme tiredness. Like I said my son sleeps 11 hrs a night and I sleep 8 hrs a night.
4. Light-headedness- I do have a BP of 110/70 so if I get up fast I get dizzy, but more now than before.
5. Started to have SEVERE pelvic pain right above my c section scar. It hurt so bad I was about to go to the ER. I was home alone with my 6 mo old so I tried to wait it out. I called my OB and they got me in. In his exam he felt a huge knot in my pelvis and it hurt like a MF! He suspected a hernia so he sent me for a CT scan.
Got the results yesterday and they came back normal. He said maybe I bruised something. But why do I have a big knot in my pelvis?
I feel like I am crazy. My bf takes my pain issues with a grain of salt now days. My OB did say since there is progesterone in the Mirena that my leg issues could be from Mirena and he was more than happy to remove if I wanted.
I still have it in and more and more I am thinking of getting it removed. My issue is I am so bad at taking pills and didn't like the Depo.
Anyways ladies...please let me know if you have had these issues. My email is arizonaequine@yahoo.com
Hope this can help someone feel less crazy!!