Prenatal visit.

Hii. So last year i had a blighted ovum, where the baby didnt develop so i was pregnant without a baby or yolksac, and had a "miscarriage" at 9 wks. Now, i am 11 wks pregnant. (: and my first oppt was when i was 7 wks, and we got to see that there was a baby in me this time! My next oppt is coming up on tuesday and i will be starting my second trimester. I dont know what they will be doing. Will i be able to hear the heartbeat? Ill be with another dr in the building, not my regular one, should i bring up my history? Please let me know what happens, im really anxious lol.