MOMS ONLY!!!PLZ..I NEED HELP?

iM 16yrs old nd i believe that imight be pregnant..My tummy hurts all the time ibeen feeling like ihave to throw up 24/7 of the day and plus.im gaining weight.icant fit my clothes no more.my feet are always puffy and hurting.i bought a pregnancy like a week ago but i think it has exp:.what should ido help me!!! {mommies} :)