natural birth control

Does anyone have any suggestions of natural birth control? 
I'm not worried about STDS as I am in a committed relationship 
I have successfully been using the FAM and pull out method for 2 years now but I just always have that worry in the back of my head. 
I'm not ready for children right now and I want to be responsible but I don't want artificial hormones in my body as previously they've made me feel horrible. 
I have tried several different pills and gain weight and feel depressed.
I know condoms are an option but is there any other suggestions. I find I am abstaining from sex due to the worry.
Thanks in advance 
EDIT: Please don't waste your time commenting "abstinence" OBVIOUSLY I know that. If you read the post you will see I have been abstaining from sex... I'm asking for unhormonal options?