I agree with Bam to get a digi test. its either a yes or a no.
Ive had a month where i had a +OPK for 5 or so days. because i had had so many problems with cysts (some so big he thought it was something else) that he thought my egg wasn't dropping and my body kept on trying to. he saw cysts on the US but nothing that would indicate I still had a mature follie there... so maybe it was the test i was using.... goodness knows!
I alos talked to my doc today and she said that once you get that first surge that you should no longer continue to test after that. She had helped alot of women become pregnant so i think im gonna take her word on it. ive met a lot of quacks in the past but she is really good and passionate and what she does. I cant even afford her sometimes lol
I have no idea but I am having this problem this month too. I think i need to either invest in better OPKs or just give up all together....I had a definite positive last Wed. but then again on Monday??? I am so confused right now.
That does seem very odd that you would have a surge for 4 days. Are you absolutely positive the test line is as dark or dark then the test line? Maybe you could try picking up the clear blue easy digis? There is no mistaking the smiley face :)