I have had a dull ache in lower abdomen, mainly right side for 16days im 4 days late, did pt, its negative. also sore nipples for 7 days. ?

Doctor can evaluate: For aches in the abdomen, with a negative pregnancy test, one should call the primary care doctor or the ob-gyn (sometimes the aches are not due to menstrual or pregnancy issues). The doctor can get the details and offer some advice. Since it has been about 15 days since a possible conception date, the pregnancy test could still turn positive this week, even though the first test was negative.