 [ Symptoms ] what week in pregnancy will a test be positive last menstrual march 5 9 2013 i had two days spotting march 21 22 very light i went to family doctor to start mediction march 25 they did pregnancy test negative i drank one beer a day after work and smoke i started celexa on the 26th of march 20 mg it was too strong so the next week went to 10 mg i took another pregnancy test on april 8 2013 also negative april 13 2013 negative so i continued my meds drinking beer and smoking  april 19 2013 pregnancy test positive [ Disease ] my pregnancy test showed up positive at 4 weeks with all 3 of my pregnancies but everyone is different it just depends on how much of the hcg hormone you have at the time you take the test