Hello, I had protected sex on 21 may (while not being fertile. My periods date was 15 june but it's 20 june today they are not here yet. I took the home pregnancy test which was negative. I also approached a gyno she just asked whether the test was negative or positive & I told her and showed her the picture of the test. She prescribed me primolut - n for three times a day for a periods of 5 days. Do you think the dosage is right ?and how does she is so sure just as per the home test result? And what if the medicine affect me in any wrong way? Is it safe to take (age -19)