birth control?

Hello ladies ! I just had my baby on April 5th. Now im waiting here at my Gyno for my 6th week check up. I really do not know if IUD is the best one (I was thinking Mirena). I spoke to my husband and he said he rather for me to not use any birth control. (I also was thinking the same thing) The only birth control that we practiced before planing to have our baby  is the "pull out method" and it worked for us and we been together 5 years. I know 3 people that used IUD and it went wrong on them. One girl got pregnant while on the IUD , I know it's crazy ! But she told me the the baby did not have any chance of surviving. The 2nd girl when they took it off they kinda "scratch" her uterus ? So she's having a problem having her 2nd kid. The 3rd girl, took off the IUD (because she was planning to have a kid) she got pregnant but the baby was in her fallopiantube, so they had to do an abortion.