i had un protected sex on the 31 dec and i was supposed to return to get my depo shot on jan 5th but i changed my mind and am not on birthcontrol. i started feeling nautious dizziness and cramping and had bad head aches and leg cramps and sore breast and i went to the military doctor and she refused to give me a blood pregnacy test saying it would take too long ,this was last monday my symptoms have not change could i be pregnant if my urine test came out negative last week.