Pregnancy?

After not having sex for a while, I've recently "gotten my groove back" and have been sleeping with this one guy pretty consistently for about 2 months. He's a really good friend and were on the same page about pretty much everything so I trust him a lot. The only thing is we've been super dumb and not used a whole lot of protection. He pulls out and we use a condom every once in a while but that's about it. I know that there's a huge chance that I could be pregnant because we didn't use protection and I'm late on my period but I was just wondering, for the women who have been or who are pregnant, how did you know that you were? When did you feel like you were and what were your symptoms like? I just want to know what other people's experiences were like.