Of course it's horrible for you! And just because it's called a "blighted ovum" doesn't make you feel any better. I should have said right away how sorry I was that you lost your baby.
Your DP has to understand that you really are not well. I had the same problem with my dh. If you have another appt soon, then try to get the doctor to explain to him that you need this recovery time. If he doesn't go with you, then ask the doctor to tell you something that you can quote to him about that. Usually they will take it better from an authority figure.
If you have a history of spina bifida in the family then you should see a doctor before ttc. In that case you are supposed to take way more folate than the average pregnant woman.