Sadness or depression?

My baby is 5 weeks old. My husband took 1 month of work to be with us at home. In that month we did everything together. We took turns to change diapers, to feed her, to sleep, etc. Last week he went back to work and since then I'm sad. I cry almost every day.

I spent all day at home. I dont have any family or friends (they live more than 5000 miles away).

My husband works 12 hours a day. He comes home tired. However, he spends time with our daughter, feed her, and get her ready for bed.

I feel lonely. I would like to share all the new things that are happening to us with someone else.

I started looking for mom groups on fb in my area, but they are all for moms with toddlers or older kids.