Similar to what @Lydia said. I use the clue app to track my period and ovulation days. I can tell natural though when I'm ovulation without even having to look at the app. You get used to it.
I did the above.. not the temperature tracking but used the flo app to track & I’ve got a 4 month old 🙃 supposedly it was one of my low chance days and about a week after my peak ovulation so won’t ever trust that method again! Wouldn’t change him for the world & we actually tried before him and had an ectopic, then decided to move house first which then didn’t happen 😂
After my first I went on the mini pill, safe for BF and I didn't want anything long term as I knew we would want to try for a second. I've not long had my second and I've had an implant this time, I haven't had any BF supplu issues. We don't want any more babies but I was terrified of the idea of a coil 😅
I personally went back on the pill after baby 1 and it didn’t affect my supply. I wasn’t meant to get pregnant within 18 months due to having a section and wanting to fully heal before trying, so I trusted nothing but science 😂 no scares and pregnant again first cycle I stopped taking it.
I love using natural cycles (temperature tracking) which is fully natural, non-hormonal and non-invasive. It takes daily tracking of your morning temperature but I think it's worth it and you get to know your body. Hope this helps x