Prayer for Salvation

Pray for my husband. This past week my husband told me he isn't a Christian. When we got married he claimed he was and we had been doing to Bible studies and praying together. We now have 3 children and one is autistic. I know he loves our children, but he has stopped reading the Bible with me, he has stopped praying with me. Before he told me he isn't a Christian we had agreed to get some things for the women at our church and boom all this happens. I truly don't know what to do. Also my husband has PTSD from serving. Kim W