Advice please on ovulation test

[2have4kids]

Hi there, I've never been able to get a read on my ovulation tests and this morning, cd10, I've got something.
It's the 3rd cycle of chlomid and I'm going in for IUI and supposed to call when my OPK is positive. The line is about 50%, do I call? Does it get darker tomorrow? I'm worried that if I wait, I'll miss it. If I call, I might be early. I've left a message at the clinic today but they usually take 24 hours to call me back (tomorrow afternoon). What do I do?
Have you ladies seen it where the lines get darker if it gets closer to day 14 (the day we're supposed to O)? My cycle last month was 32 days long. We did the bd anyway but would appreciate hearing what you think. Thanks in advance for your wisdom

 

[Bats11]

I found those ones a little difficult to read they confused me, so I used the digital one that gives you a smiley face when the LH surge is detected!

Goodluck

 

[2have4kids]

OK, it's day 12 and the line is even lighter. I'm hoping for something shocking and surprising in the next two days. Does anybody else get very super faint lines from cd10-13/14 and then voila a dark brilliant red line? Having never seen one it'll be a mini celebration if it happens but I'm not holding my breath.