Confused!! 3days of positives!!

[ljo1984]

Never had this before!! Last month I had been unwell so my tests kept going to the same darkness as control then light again a few times before my body managed it. This month I've had three mornings where I have had a positive opk then by evening time it has gone to negative! As I say I've never had this happen. I'm not actively ttc just yet, just tracking cycles for when we do. I normally ovulate cd17, today is 19 so I've have positives 17,18 and 19 now! I've not had much ewcm as I've started with a yeast infection at same time here's a pic from just now.
https://i1214.photobucket.com/albums/cc499/ljo1984/E7C40B1D-A8D3-4375-865C-6AFA6EE3FB90-5502-000008B69E67F1FE.jpg

I don't temp but when ttc I'll be using cbfm again with opk's. I used this brand with dd2 and the monitor so know there ok. Very confused!