I had my tubes tied 7/18/16 same day i delivered my daughter. now almost 2 years later i'm lactating & feel the same way i did before i tested positiv?

Pregnancy worries?: A urine pregnancy test, done correctly, gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and thus lead to a repeat test. If a woman gets her normal regular periods, then she is presumed not pregnant.