Worried

My Daughter Is 12 Months & I Been On Birth Control Since I Had Her But I Recently Got Off 2 Weeks Ago & I Had A Peroid Last Week But Today Me & My Boyfriend Had Sex & He Made A Mistake & Came In Me But An Hour Later I Went To Airtime ( Trampoline Place ) With My Daughter & Now My Lower Stomach Cramping Can I Still Get Pregnant?