He usually knows about where I am each cycle. It's easy to tell when it's almost time for AF though - I get severe migraines, which I had last night so I know that this cycle isnt' the one for us either!

I think I may talk to the dr about a break this cycle so that I have all month to schedule the HSG rather than the first week before becoming fertile. Plus Mike has to travel for business in April which could ptentially mess up this cycle anyway.