Pregnancy and sex after a miscarriage

This might be tmi, I had a miscarriage about a year ago, and now I am about 3-4 weeks with another threatened miscarriage. My husband and I haven't had sex since we basically conceived. I tell him he doesn't have to penetrate, just from the outside...but he still can't, he's scared and worried to death, at the same time, I feel horrible for keeping him sexless for so long. What do you think? Has anyone had this issue?