Advice anyone?? Please

Felicia

Hi so this is my first time posting, me and my husband have 2 kids already a 7 yr old and 2 yr old. We don’t use any protection just the pull out method and it has work for 2 yrs lol, but in my fertile window my husband wasn’t so careful and didn’t pull out all the way before he finished. Well now my period is 6 days away and my boobs and nipples are so unbelievably sore and are even a little darker, and I have been having horrible heart burn for a couple days which I only get while pregnant. So I guess what I’m asking is if anyone has gotten pregnant with the pull out method and what there symptoms before testing were??