Timing of OPK's

[Indadhanu]

My FS gives me OPKs, and tells me to test from about day 12/13, though if you have short cycles maybe it would be worth testing from day 7? They also say use the second pee of the day afte it has been in the bladder 3 hours, as LH is usually produced in the morning, and the FMU generally isn't strong enough...

I don't know if thats standard, but thats what my FS does anyway.

Use CM as well, as OPKs don't work for everyone!

[nagromeyk]

ok girls well I went and brought a digital clearblue O kit like I said I was going to.
Started testing like a week ago, still havent had a smiley face yet

I only have one test left. When I look at all the tests (I only kept the last 3 days tests) the 2nd line is appearing to be getting darker but is still no where near as dark as the control line. Should the tests just keep getting darker or have I missed 'O'? Does the LH only surge for a short period or does it need time to build up in your body? This is confusing and frustrating, I knew I should of kept temping lol..... but just wanted to relax about it this month.

I have kept the tests so could post a photo I guess....