What are the chances i will miscarage??

ok so i took a pregnancy test last nite 3 to b exact they all were posive i wentt o the docotor today and the pee test blood test wee still postive but they can figure out how i can be shoing up on tests this early i mean the number was 383 n they want me to come in on wed to take a nother one to make sure it is going up not down so i am scared what are the chances i am going to lose it i am so scared.. i mean the doctors in virgia are idiots solol.... i knwo the bes i can do is wait but it is like aaaaahhh.. so i dunno i have like very lil cramping my last period was feb 11 or 8 or somethinglol between ne wasy so i just dont know