10 wks, will they check for heartbeat on a doppler?

Don't freak out. Every pregnant woman has worries and fears. You cannot control what happens when it's a miscarriage. If they don't see/hear a heartbeat, they will probably tell you to wait a week or two. A pregnancy isnt locked in officially until 15 weeks. This is when they will tie an incompitent cervix, and do anything to keep a baby in. Until then, they let life run it's course. If the baby is thriving and matching well with your body, it will keep. No need to stress, just makes the waiting worse. Good luck! :)