My period was supposed to start 1-26-15, i threw up 1-21-15, negative pregnancy test 1-24-15, I'm tired, constipated, sore boobs, rock hard nipples, back pain all day, i can smell everything, i pee every hour on the hour but i tested again 1-27-15 and its still negative, should i just see a dr. or test again now, i really dont want any more disappointment.