Hi Noodle, CONGRATULATIONS .....the same happened to me this month, waiting and waiting for AF to show and low and behold, I was pregnant naturally!!!!
We are due our heartbeat scan next week (which is where it all went wrong for us last year too) so nervous and excited at the same time.
I did go for a scan earlier but it was too early (4wks) and they couldn't see anything so make sure they don't send you in too early as it was hell waiting for the following scan but thankfully we saw a sac etc but too early for h/beat.
I'm positive that this beanie will stick around, well he managed to get there on his own accord

without any medical help!!
Meg - interested in what so of work out you do, I've been to frightened since finding out but going to gym tonight for a light work out !
Good luck noodle, let us know how the bw goes
Jackie x