Natural Birth Control

I’ve been looking into natural forms of birth control, I just had a baby a little over 2 months ago and currently my doctor prescribed me the Nuvaring. The only thing is I absolutely hate it! I hadn’t been on birth control for 9 years before I got pregnant so my body got used to not being on anything. I’ve been looking into FAM and wondering if this really is an effective form of birth control, especially after I just had a baby and my body is out of whack. I know we can just use condoms, but we both don’t like the feel of them. Before I got pregnant we basically just paid attention to my cycle and didn’t have sex around my fertile time and that worked for us, but I’m worried about it now that I just had a baby and I don’t know what my body is doing. Just wondering if anyone had any thoughts on this. Thanks!