Birth control and singledom

Well, today was an interesting day, to say the least. It was full of cravings, self-pity, and longing. 2 months ago, I went to my gynecologist to ask if I could have an IUD. I did this because of my ex, I wanted to make his life easier. I also thought this would make me feel closer to him and make him realize how special I was.
My health insurance had to approve it and ship it to my GYN. Long story short, today was my insertion day and I haven't had sex in 7 weeks. I know this sounds absolutely absurd but I felt so miserable getting this done. One reason was that I no longer have a need for birth control and the other was because I was doing it partly for him and he never cared at all. I have been in a negative, pissy mood all day and I have no idea why. It really stinks to feel this down during Christmas time.