okay, i don't believe that ANY hormonal bc is "safe". my husband is a pharmacist(oncology is his specialty), and he is absolutely opposed to my being on ANY type of hormones out of concern for my health(cancer, strokes, blood clots, etc.). so, for me, that rules out the pill, the shot, the ring, etc. additionally, i know 3 ppl that did the shot - ALL THREE gained LARGE amounts of weight(like well over 60 pounds), none of them have EVER been able to get the weight off(and for one of them, she got the shot like 16 years ago). also, none were ever able to have children after the shot. i would do a LOT of research before even beginning to go down that path.
now, on to the IUD. that violates another rule i have - no implanting a foreign body in my body that isn't necessary to sustain my life(such as a pacemaker or something like that). the main reason i won't do that is infection risk. i had an IV port(PICC line) several years ago that infected and also killed me(literally, i was in ICU with 48 hrs to live according to the drs). i have a few friends that did the mirena. one ended up with a horrible staph infection in her uterus that took over a year to diagnose. she has not been able to carry a baby(2 miscarriages) and has had a great deal of difficulty getting pregnant since having her mirena removed. the other two friends have also had miscarriage issues, and both had trouble with the IUD getting "lost" and had to have ultrasounds to locate it for removal.
for my husband and i, we use natural methods. condoms, paying attention to my cycle, etc. my husband is actually getting a vasectomy on friday b/c we know we are done having kids. after that was scheduled, due to some female issues i'm having, i am also having an endometrial ablation and a tubal - hormones would treat my problem, but i'm not comfortable being on them for years.
good luck with your decision!