hiya luvvie! Just wanted to add a wee note regarding my opks, (as you may know already) i was getting continuous dark(ish) lines most of the way through, but these were ICs and were for 15-20miu, so quite sensitive. some of them go up to 40miu. Maybe check what the sensitivity is? Also on the afternoon of my positive opk, i only got dark lines again but decided to go to asda and buy their brand which is 20miu or maybe 25, but anyway, i done the asda one at 11.30pm and it was clearly positive. So I did another IC and it was clearly positive too. What a difference the timing makes. I was making sure to test with 2nd morning urine, in the afternoon about 2.30pm and again before I went to bed, especially at mid cycle.
Although after getting the pos on CD13, I didn't really feel the ov pains until early hours (3am) on CD15 which was Saturday morning. So thursday night pos opk, then THINK i ovulated on Saturday morning. My CM was also loads! They say to make sure you wipe yourself (TMI) BEFORE having a pee, and especially after your have had a poop cos the pushing makes it come out (!).
I do hope that helps a bit, and know how horrendous it can be but you WILL get a positive I have every faith xxxxxx