depressed SAHM

I've been lucky and blessed enough to stay home with our little one. he is now 5 months old 😊 but I am worried I am getting depressed. I get extreme anxiety when he cries or if I can't see him. I never want to leave the house because I am afraid he will freak out and cry. the only time I leave is if my husband comes with us. my husband leaves at 6am and doesn't get home until 7pm. but our baby is ready for bed by 7-8. So I feel like I'm alone all day. I love my baby, but I don't know what to do. any suggestions?!