Molar pregnancy. Never heard of until now

Went in at 5 weeks and 4 days. And the doctor didn’t see anything. She was concerned that I might be having a molar pregnancy I guess bc it looked like it. An ultrasound tech took a look as well and said it didn’t look like a normal pregnancy. My doctor said it is not confirmed but she thinks that’s what i could have, she also did emphasize on the fact that she doesn’t know, it could be too early to see anything. She just said that if I miscarry to save it to get it tested. I honestly don’t know how to feel. A part of me doesn’t believe that’s what It is. I have 2 kids this would have been my third pregnancy. I go in this week on Friday (7 weeks) to take a look again to make sure what it is I have. If it is a molar pregnancy I will have to get a D & C and I’m so scared. I’m so heartbroken.