Could I Be Pregnant

Okay So On June 7th Me And My Boyfriend Had Sex & He Said He Halfway Nutted In Me Basically He Said He Wasn’t Sure If Any Got In Me , So On The 16th My Period Came But It Was Weird Just Cramping There Was Blood But I Only Bled Heavy For 1 Day And That’s Not Normal The Rest Of The Days I a Didn’t Really Bleed Heavy Like I Usually Would . My Next Period Isn’t Until Two Weeks But I’ve Had Some Weird Changes In My Body . I’ve Been Having Thick White Discharge , I sleep but still feel drained , everything makes me cry & for the past two days I’ve been having cramping & mild backaches , my period isn’t suppose to come until July 15th Could It Be A Possibility That Iam Pregnant?