Baby fever

My son is 9 months old and I am ready to be pregnant again. I’m seeing everyone else getting pregnant and having newborns and it’s giving me major baby fever. I love my son so much and just feel like I have so much more love to share. I miss everything about being pregnant (yes even the morning sickness), but my husband says that he doesn’t want anymore kids right now. But I want another baby so bad it hurts. What should I do. Or how can I talk him into ya having another baby?