The condom broke

Ok guys I'm really scared.im not on birth control and My boyfriend and I had sex and after a while we realized the condom was broken. We don't known how long it was broken for but we think that it had just broken before we realized it because he said that it felt different. He obviously didn't finish inside me and we got a new condom, but after thinking about it for a bit I am worried. He hadn't  ejaculated in about a week before last night and he never finished inside but I have heard that you can get pregnant from precum. On top of that this all happened during my fertile period of time.. I am so worried... after this, we had sex again and he said he pulled out. We were wearing a condom yet again, but what if he didn't pull out in time and the condom broke a little bit? We felt it a little after and it was dry but a little bit could've come out.. idk maybe I'm just paranoid, but is there a chance of me getting pregnant? And how long does it take before your next period to know if you are? Like my period should come in 13 days, if I'm pregnant would I miss this upcoming period or the next?