Ovulation Calculater Positive Multiple Days

by Gina
(KY)

I have been charting this month for the first time, but have been using OPKs for several months. Some months, like this one, I have positive results for several days in a row. I have read that you should only have a positive result for 24 hours. Today I had my 5th positive day in a row. Day one (of these 5) was the only day I used a digital OPK, which was positive, and since then my test line has been darker. What could be the cause of this? It's hard to say what my temperatures indicate yet, because I work some night shifts, so my sleep patterns vary. I've heard it may be more difficult to read in that case. Thanks for your help!