is a week before my period to soon for pregnancy symptoms?

I have this feeling that I might be pregnant, along with symptoms. I am not TTC, but I won't be super upset if I am. Lol. I am morally opposed to birth control pills(no judgement if you are on it!) , allergic to latex and we are doing NFP, but had a slip up.....my period is suppose to be in a week and maybe it's just PMS? I have very VERY sore and tender boobs, bloating and mild cramping.