Kay, I think I broke it! I was trying to post a reply to your 8.36 message and then it all broke - not its back and I see my message isn't there!
I was saying that CBD are not as sensitive as FR so that's not reliable - its never over till AF arrives.
Also, its worth noting that it takes 2/3 days for HCg levels to increase significantly so if you got a negative yesterday, it may be that its worth waiting until tomorrow to re-test as by that time HCg should be much higher?
Keeping my fingers crossed for you!