Nervous!!

Meghan
I have 3 days from my period and I am a little concerned.. I religiously have very sore and swollen breast a week before my period starts, this month I have had nothing. I have had a few strange symptoms as well like heartburn for the last week. I don't usually get it and being hungry more than often. My boyfriend and I practice the pull out method but we have never had an accident.. Should I be concerned I might be pregnant? Thoughts? Thanks!