Pregnant after miscarriage

Last xmas eve we found out we were expecting after 6 years of trying my dr told me she thought i would miscarry saw baby heartbeat at 8 weeks then was told i most likely wouldn't loose baby my next appt no heartbeat i waited another 3 weeks with 2 ultrasounds later i realized my baby was gone took a pill to start the miscarriage process started hemorrhage and was taken into surgery for a emergency dnc it was the worst process of my life well we found out we were expecting the beginning of December was ago excited went and saw a different dr ( better than the first one) told her my concerns she put me at low risk and told me she didnt have any concerns already saw this baby heartbeat but im always so scared something is going to happen i dont like thinking negative but its always in the back of my mind any suggestions on making myself feel better