E.H.
I've had Paragard for about a year now. It hurt when it was inserted, but that probably has something to do with when I got it (2 months after having my son). I think I was still a little tender in that area. At first I didn't have a period for a while because of nursing, but when I did, it was really heavy. I couldn't use tampons unless I changed them every hour, so I used overnight pads instead for the first couple days. I also had cramping and spotting in between periods. There were a few times I thought I was pregnant again because my cycle is all over the place, but that could also be because I am nursing, or because my body usually takes a while to get back to normal after having a baby.
The last two cycles have not been as heavy, and I was able to use tampons. My cycle is still all over the place, which is normal for me one year after giving birth. Once my body has gotten used to the IUD, I really like it. I like how I don't have to think about taking a pill every day or how the pill makes me feel pregnant all the time or having to keep back up birth control on hand in case I forget to take the pill. I also haven't really worried about being pregnant, except at first when I was getting used to it. I also like that I am using no hormones that may or may not interfere with nursing or my cycles. At first, I hated Paragard, but I gave it some time, and now I love it. Good luck with what ever you choose.