I voted 4-5 but I forgot some. Guess I should have voted 6+!
1--the pill, in various forms. Most of them made me gain weight, act psychotic when I had PMS, gave me acne (I usually have very clear skin), and screwed up my cycle. Plus I was always forgetting to take them.
2--the patch, got pregnant on the patch.
3--IUD, both Mirena and copper. The Mirena made me bleed heavily for a month afterward, plus I was always spotting. I had it taken out 8 months later because we wanted to TTC. It took me a year to get pregnant after that! Now I have the copper IUD and I am having similar problems--heavy bleeding (like, bleeding through a pad + a tampon every hour) during my moon, extreme irritability, always fatigued...etc. I want to get it taking out but DP has yet to get his V.
4--NFP, which I wasn't very good at, always losing the thermometer! But I did like it.
5--condoms, which I used for most of my single years, either with the pill or without.
6--withdrawal, which was how I got pg on the patch.