C*mming around the clit?

So here are the facts

- Gave birth 3 months ago

- Haven't had a period since September 27 2015, so I don't know my cycle.

- boyfriend came around my clit (pullout)

- eve says I'm into my 3rd fertile day but I don't know what to believe

I'm asking this because I want to know the truth on the pullout method. My mom said it worked for her and it's safe and I've read otherwise. So what's my chances?