Sorry this is so late! I wanted to put in my 2 cents though, so I thought better late than never!
I'm a huge fan of the copper IUD. I am currently sporting my THIRD one. I have 4 boys and got my 1st copper IUD after #2. It was GREAT to not have to worry about extra hormones OR getting pregnant unexpectedly! When we were ready to have #3, I got it out and got pregnant right away. Ditto for #4 who is now 14 months old. Although I am pretty sure we are done having kids, I did not feel ready to make a "permanent" decision, so getting another IUD was a no-brainer. I will tell you that my periods are a lot heavier for the first few months, but once your body adjusts to having it, it's back to normal. In my book it's a very small price to pay!
There is absolutely no reason to be nervous about an IUD - they are a godsend!! All three times - it didn't hurt to have it put in and the 2 times I've had them removed it was NOTHING. Seriously.
Give yourself some time to decide on a more permanent solution to birth control. IMO the copper IUD is the next best thing to a permanent choice...you won't have any problems (except for a few heavy periods) and you won't have to worry about getting pregnant! Makes for a very stress-less, and enjoyable sex life!
Good luck with your decision and congrats on your upcoming baby!