Iud, pills mess ur hormones up too much but get thw cooper one I had it and when I took it out got pregnant right away.
I had an IUD for five years when I got it taken out.I was pregnant 2 weeks later but I also got pregnant on the pill with my daughter....
Both have pros and cons, if it were me I'd go with the pill as in my opinion an IUD can cause alot of issues.
You can also look into the implanon it is a little rod they put in your arm and releases the hormones. I had two over a 5year period and had no problems at all. I looked into slot of things before getting that and seeing how IM allergic to adhesive I couldn't use the patch, bad about remembering to take pills, hate getting shots and hear that the iud could move and do internal damage so this was my choice