I have just added this to my thread and think i may start a new one on it becaure i spent i don't know how long researching 'lighter lines' and couldn't find the answer!
Yesterday I emailed the suppliers of my ovulatuion test and they have emailed me this reply today.

Hi Claire

In around 5% of ladies the urinary LH never reaches 25miu needed to give a positive result. This is quite normal for these ladies and they are usually ovulating. It does however make using Urinary LH tests quite difficult.
We usually recommend a trial of 3 cycles, which you have done, and then to try differnet brand to see if you can find one that gives clear positive results, possibly a digital one.


Thank you for contacting Access Diagnostics


Hope this helps you with your results too.

Claire

Cool, its a good idea tho have something to compare it to. Ive jsut been on the BBT link at the bottom of Akcher's post on my tread 'ovulaton advice needed'. It's so cool, you get a 14 day trial but i think im going to sign up as it seems well worth it and a goog way to track your fertility! Have a look.

It often happens alot earlier. My best friend was trying for 4 months and nothing happened so her and her man decided to get married and start trying later after the wedding. 2 months later, on day 7 of her cycle; thinking everything would be ok; they did a bit of unprotected babydancing and to cut a long story short, she is now 4 months gone! Wedding has had to be put back but she is really happy.
I know wheat you mean about getting obsessed, i think i have and need to stop!!