Annie, Munchkin - congrats! What a great start to the day.
Don't have time for full post, but quick update - looks like my stronger positive was a faulty test. Took another today and it was really really faint - so seems that I'm definitely not newly bfp, just still working out the old hormone. Off to get beta results and scan shortly, but I know I'm out. Pretty devastated after fooling myself that it was good news - ah well. Maybe next month