Hello All,

My period is supposed to start on September 17th. Well the <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> says September 13th but two other apps say September 17th. I tested yesterday using the BFP pregnancy test strip and I saw a very very very faint line. I tested this morning using my first urine and saw the faint line again. Tried to show my husband and he couldn't see anything. So now I'm thinking I'm seeing things. When should I test again to get a much darker line? I'm on day 21 of my 28 day cycle. Im thinking of waiting to test when I miss my period.