Empty Gestational Sac...Blighted Ovum

I had some bleeding yesterday morning, so I called the dr and went in...the ultrasound showed an empty gestational sac (blighted ovum)...I'm 7 weeks 6 days today...the sac was the size it should be but no baby...the dr said I will miscarry naturally. He didn't make another appointment to see me again. After getting home and reading many women have gone back for ultrasounds after a week to make sure that is what is going on. Should I get a second opinion? This is just completely heartbreaking and I can't believe it's happening to me.

The dr didn't check my levels, nothing...I know some women wouldn't want to get a second opinion but I feel like it will give me some kind of closure. From what I read, this blighted ovum is torture. Because you never know when you're finally going to miscarry. I've read some women will continue to carry, have pregnancy symptoms until 12 weeks. I am a working mother of 1 already and I am just a mess.