J.F.
Have you thought about Natural Family Planning? I can't use hormonal birth control, and I hate the idea of IUD's. You basically tell when you're fertile or not by taking your temperature every morning (there's more to it, but I'm not sure on all the details). My parents have used NFP for over thirty years and it's worked marvelously for them (obviously, since I only have two siblings). :P
You can get information on NFP from any Catholic parish (you don't have to be a member or even Catholic, for that matter). There is usually a married couple who teaches a small class about it, as well. I hope you find something that works for you. :)