I recently took a pregnancy test well actually 5 of them. The first test didn't work at all. The second test taken 30 mins later appeared to be negative. I ran to the store and when I returned 20 mins later there was a very dark line indicating a positive result. This line is exactly the color of the control line (cobalt blue). I have been using the nuva ring as birth control but I have not been as consistent with it as I should be. Anyway I assumed that was either a positive result because I only waited 2 minutes before checking the results and assuming that I had an all clear. I have since taken another test the same night that said I was negative and two more two days later both indicating negative. I have searched for answers to this on the internet and can't seem to find anyone with this experience. I know that results are said to be invalid if after 10 mins however I didn't wait 10 minutes before heading to the store. What are the chances that I am pregnant? I am just so confused by the very dark clear line and the short time that elapsed from when I took the test to when I rechecked it.