Baby fever? :( & missing hubby..

So today my sister & brother in law are having their baby and I am sooooo excited and happy!! But also I'm sad because my hubby is in rehab facility and won't be here.. and slightly jealous? Ah I feel bad for saying it. We've been together for 3 years, wishing we had a baby together and I haven't seen him in 2 months, at all. Just phone calls. So I'm having baby fever AND missing him lol I feel guilty for it but I'm so happy for his brother still!! How do i overcome the next 4 months ugh😫any tips would be amazing ladies! It's really difficult to go from being with someone everyday for 3 years and then they're gone in an instant. Any advice please? Thank you!!