Can someone please help me out? I'm not sure what I'm looking at

[rawrrasaur]

So yesterday (cd 15) I got a blazing positive on an opk (the line was darker than the control) and then I bought a pack of Answer brand tests and got a lighter line so I figured my surge must be over.
Just to confirm, I bought more of the first test brand and the line seemed lighter this morning/afternoon... until now. I just peed on another Answer brand test and the first brand test I used. And the lines look darker now and I am so confused. I had ewcm for 3 days before today but it seems to have slowed down. I also had some off/on twitching/cramps to my left and right sides and kind of a tugging feeling last night in bed.
The twinges/cramps stopped after this morning. Did I ovulate? If so, why am I getting darker lines again?

Picture time...

Tests I got the positive on (they were white/very light and then overnight they got darker):
https://i1179.photobucket.com/albums/x384/meowmix587/downsize2.jpg

My tests from today (negatives?.. the bottom test isn't as dark as my opk from yesterday):
https://i1179.photobucket.com/albums/x384/meowmix587/0904112337.jpg

The dark Answer:
https://i1179.photobucket.com/albums/x384/meowmix587/0904112246.jpg

And for reference, the lighter/negative Answer tests:
https://i1179.photobucket.com/albums/x384/meowmix587/0905110006.jpg

Can someone pleasee help me out? I don't know if I already ovulated or what is going on just because the tests seemed to get lighter then darker and the crampiness has stopped. I just want to know what my O day is so I can start counting down to my period (trying to find out if my cycles are reg or what).
Any help would reallly be appreciated.

 

[rawrrasaur]

Just checked and I have realllly stretchy ewcm.. well, it's kind of milky colored but it's feels like ewcm it's just not clear. It's a lot more stretchy than from the other day.

 

[37Hopeful]

It's difficult to tell from the pics but I would say if you haven't ovulated, you are very close!

 

[rawrrasaur]

Well I know I got a positive opk two days ago (I didn't take a pic of it) but the tests went from white to having a test line way darker than the control overnight. Now they seem to be staying kind of dark and I just wondered if that's normal considering they were so light a few days ago. I haven't tested yet today, but I'm hoping they are back to negatives again. I want to try to pinpoint the day. I'm not temping or anything.

 

[rawrrasaur]

So I took my last Answer test and it's getting lighter Also had some mild twingy feelings/tuggy cramps this morning which stopped. Without temping, I'm just going to call today O day because of the neg test and start my countdown.