 [ Symptoms ] is it possible to find out that you are pregnant 16 days after sex  my boyfriend and i have been seeing each other for nearly 4 years now and we have unprotected sex each time we have sex we took a break got back together on may 19th and had sex my period is irregular i am not on birth control or anything like that i have experienced some symptoms lately such as heartburn nausea lower back pain frequent urination and sensitive breasts it is been 16 days and i was wondering if it is possible to find out if i am pregnant within those 16 days [ Disease ] i am sorry but i do not have enough information none in fact to be able to determine why you are having frequency of urination i suggest that you see your medical provider so you can be properly examined have your urine tested for infection and perhaps have a blood test for diabetes