The LH means you have ovulated. I think I'm right in saying the blood test for LH is
normally done on day 21.
The thing I'm not sure on is how long LH stays in your system... till next AF maybe?

If that's right, then this is probably day 49, it seems unlikely that you would ovulate before day 7 and your chart seems to stack up with that.
Take your charts with you to your next appointment. Although none of my docs and consultants have encouraged charting, they're all dead interested to look at them!
They might do a day 5 blood test next. That checks whether your piturity gland (summat in your brain) is generating the right hormone pre-ovulation.
Hope that helps.
H
xx