I keep thinking I want a baby until I get a “scare”😣

My partner and I have stopped using birth control and using the pull out method, we are at a stage where we would like to avoid pregnancy but we could also handle a baby. Our families would actually be really happy lol. We had sex all through my ovulation window which we usually avoid, my period is due in 10 days and my boobs are already sore which is so not normal for me. I’m very lucky and experience no cramping and my boobs get a little sore the day before my period. Can that be a sign of pregnancy so early on? I ovulated last week. I was just saying to my friend that I wanted to be pregnant but the fact it can be a reality scares me so much. I also want to be a young mom - I’m early 20’s. It’s just such a big thing. Me and my partner have a very strong relationship and our own place with room for a baby.