I really want to do the Fertility awareness Method

But I really don't want to get pregnant for at least 6-7 more years (I turn 21 on the 26th this month). My husband and I do not want kids for quite awhile, but I don't like the pill because I know it keeps extra weight on, and I get nervous that it could effect my fertility in the future if I keep using it. I've already been on it for like, 4 years. I always let my husband cum inside me-I enjoy it as well-so maybe this isn't the right method for me? I also do not want a "whoopsie baby". And the last thing I want is an abortion. Any thoughts? Anybody done the fertility awareness method? With success or failure? Thanks 😘😘