I've been feeling queezy a lot recently so poas just to rule it out. Turns out I'm expecting dc2! 
Thing is, I'm still bfing dd (9 months) and periods haven't returned, so I've no clue how far on I am, clear blue days 3+ but that doesn't narrow it down much! Anyone know how that works with booking in dates /scans etc? Have made a gp appointment but first one available isn't until next week so hoping someone here can shed some light! and then I can turn my mind to alternating between celebrating and panicking about having two under two