PreSeed and blighted ovum

Has anyone here used preseed and had a successful/viable pregnancy? My husband and I got pregnant the first month of using it (have only been trying for 2 months) but found out at 6-7 weeks that we have a blighted ovum. I am wondering if the preseed has anything to do with it or if it's safe to continue to use? I asked my OB this today and he has never even heard of PreSeed, so I'm just curious.