Thanks soulmate, I shall try to hold off going to the toilet for longer next month and see what happens!

I have tried the Confirm brand, but only had negative results. Because there are only 4 tests in the pack, I thought they were too expensive, so I switched to LC.

However, a friend of mine used the Confirm OPK successfully and had a "true" BFP on the Confirm HPT.
I know what you mean though about being unsure - I would test twice anyway with a BFP, so maybe get another brand as a back up...