How old were you when you were first pregnant? Planned or not?

I am about to be 20 and lately I have been having the 'baby fever' very bad. A lot of people that I graduated with are having children, and just a lot of people I know in general. I have been longing for a baby to love and care for so much lately. I have spoken to my boyfriend of 4 years, and he is kind of on the fence about it. He isn't jumping to have a baby, but wouldn't be upset or mad. I just wanted to know everyone's personal experiences. It seems like my maternal instincts are in overdrive and I just went off of bc a few weeks ago. Can't wait to hear!