Chance of being Pregnant?

My fiance and I just started trying for a baby when my last period ended (due in 4days now) we've been trying everyday since my period ended and I took a pregnancy test yesterday (which was before I downloaded this app and said it was too early to take a test) and it was negative. Ive been extremely nauseated but haven't thrown up and my boobs are like really sore, like hurts to touch them, indigestion and some cramping but I feel like I'm psyching myself out about it and I'm just anticipating being pregnant (I don't usually get nauseated or have sore breast before my period). Any thoughts I'm if I'm just psyching myself out and the chances I could be pregnant?