It is totally normal to be concerned, especially after experiencing a miscarraige. You can buy a doppler to hear the baby's hearbeat at home. They are not to badly priced on Amazon. Once you start feeling your baby move everyday it helps takes the worry away. You still have a little ways to go before then but try to relax. No cramping or bleeding is a good sign!
Sweetie, calm down. If you constantly think about what could go wrong you'll drive yourself crazy. Your pregnant, enjoy it. If you're 12wks, you'll probably have an ultrasound soon anyway. By the way, 12 wks is usually the time when women "stop feeling pregnant" because the morning sickness usually stops at that time and it's still too early to feel the baby move. But all that is normal. Just relax. You'll be fine =)
I was the same way I still get nervous every doc appointment worrying I think is just apart of being pregnant