I'm usually pretty on time with my pill, I take it around 11:45, 12:00ish. Last sunday though, I went to my grandmother's and forgot my pills because I took the wrong back. When I came home I took it at 4:45. I continued taking the pills on time the next day.
However, when I went to the beach on saturday, the same thing happened again. When I came home at 3:00, I took the pill, so I was around three hours late. I haven't missed a pill yet, I've just had two days of taking it a few hours late.
It says if you miss a pill, continue taking the pills and use backup for a week. (Obviously you should be using backup anyway).
My question here is: have I decreased the strength of the pill? I haven't missed a pill, I've just taken two pills on different days about a week apart a few hours late. I was wondering if my chances of getting pregnant are increased.