6 Weeks Pregnant, No Heartbeat

Chels • 29| TTC baby #1| Tx.

So I found out I was pregnant on January 26. I was suppose to start my cycle on January 23. My last cycle was December 30. I went in today for my first appointment today (at supposedly 8 weeks). The doctor said the baby was measuring at 6 weeks and they didn’t see a heartbeat. I haven’t had any bleeding/spotting or major cramping. But my boobs/nipples don’t hurt as bad as they use to. I’m still very nauseous. Should I worry?