Hi all, this month I used an opk and I noticed that the result line has been darker than the test line for four days now. What is going on, I thought that the lh surge only lasted for a couple hours....Mine seem to be lasting for days. It has been darker than the result line from since sep. 3rd., then sept 4 still just a dark, sept 5 same thing, then yesterday although the result line was still darker than the test line it was lighter than the previous days. What does this mean cause right now I am very confused.

For all those wondering, this is the second month I have used opks, however last month I stopped testing as soon as I saw the darker result line, this month I decided to keep on testing to see what would happen.