Thanks for the input, how great!
Well, definately did not take any chances and covered all bases just in case..iykwim!
I did another OPK (different brand) late yesterday and it also came up a faint line. My temp was 36.6 which for me, is on the higher end of the scale.
We're both pretty rapt that even if it isn't "the" month, the whole possibility that I am ovulating naturally feels like a mini breakthrough.

Hopefully the specialist this week will begin to deliver some clarity [-o<

Every day that passes, (and not even been trying for ever like some) I realise what a gift this truly is. Such a delicate little process isn't it?