Terrified of blighted ovum

Amanda • I`m going through a separation. I have a 5 yr old. Had one ectopic pregnancy back in December. Pregnant with baby #2!!
I never had one before. My first pregnancy was perfect. My second ended with a ectopic pregnancy... I am now 5 weeks 6 days . Ectopic was rulled out at the end of my 4th week but they couldn't see Anything but the uterine line was thickened and my hcg level was at 694. I know my levels are progressing, but I've read that your levels can be rising perfectly with a blighted ovum. Ughhh. I'm so worried that everything will go wrong. I can't go through another loss.