Hello. I was using Heroin for about 2 years now. However last year around June I detoxed myself and was clean for approximately 4 months until I relapsed. When I relapsed I started sniffing it as when I started but for about the last 5 months doing heroin I was shooting it. I have been sober now for 40 days, but I have not gotten my period in at least 4-5 months. When I was doing this drug I have never had a problem with my cycle. My at home test is negative for being pregnant. I took 3. I have been sexually active and have been trying to get pregnant for the past 3-4 months. Could my test be wrong? Or is it because of the drugs.