I am 27 and had Mirena put in about 2 months ago during my 6 week...

I am 27 and had Mirena put in about 2 months ago during my 6 week check-up after my second child. I had been put on a mild antidepressant for "baby blues" only a week or so after my son was born. So I didn't notice the mood swings so much after I had it put in. But after gaining back some of the weight I had lost, I decided to forego the Lexipro for a while so that I could take diet pills to help me lose the weight. I expected to be more moody, but I didn't expect anything like this. I cry at the drop of a hat, I freak out on my 2-year old unexpectedly, and I have NO sex drive. It is WAY worse than before. I also have been to the doctor for problems with my knee. It hurts all the time. My other joints ache pretty bad at night, and I have never had joint problems before this. The past two days I have had a stabbing pain in my abdomen. It hurts when I move or sit down. My stomach is very swollen, and now I am wondering if it is the bloating that many of you are talking about, or if it is swollen from an infection that may or may not be causing the pain. What do I do?! I hate not to stick it out for a while, because I really don't feel as if I have much of an alternative except for something perminant. My mother AND my grandmother got pregnant on the pill, and I can't remember to take them at the exact same time every day. UGH!