i think whoever has experienced a loss is ripped of that first innocence of an uneventful pregnancy, and the equation pregnant=baby every single time.
...and i also think there's no real formula that works for everyone: testing, scans, dopplers, taking it day by day and deciding to enjoy whatever time is given to you to spend with your baby, and so on...
i'd personally avoid the doppler as they aren't as easy to use as one can think and i'd drive myself crazy if i couldn't find the heartbeat straight away.
for the very same reason, although it has been two years since my last loss, i don't have any tickers in my signature as i'd just be driving myself crazy and obsessing over how much time has passed since and so on.
also, losing a baby changes you profoundly as a person, it took me about two years to realize how much it did, actually... so whatever reaction you ladies are having, please remember that it really takes a lot of time to heal, even when you are pregnant again straight away. the new pregnancy/baby doesn't take the grief away, at least not the whole of it and you may as well find yourself having mixed feelings of joy and devastation together, or breaking up in tears for the loss out of nowhere months ahead, even when everything is running perfectly.
it is just a part of the process, and the less you stress and beat yourself up upon your own "weird" reactions that get you unexpectedly, the easier it will be on you.
hugs and congrats on all of your rainbow babies !!