i never had a positive urine test with my son and i was pregnant. i would go to your doctor or a clinic and have a blood based pregnancy test for more accurate results. it may (i can't remember) take longer for the blood based tests to work - for more time to have passed than 3 weeks. but bottom line i would not rely on the urine tests and you may want to consider that you may be pregnant when making decisions (e. g. drinking smoking taking medications) until you have gone to the doctor.
i am going on 3 wks late on my period. taken 3 otc pregnancy tests. could i still be preg or what else could be cause? . should i get in to see my gyn? the 3 preg tests were taken a week apart but still not pregnant.