By the time you read this, I hope you have been diagnosed and treated and are doing better. But I'll make a few general comments, anyway. Viral pneumonia is never common , even in people with HIV infection. Again, it would be unusual for such an unusual complication to occur in both of you together at the same time. There are number of other considerations that come to mind when you tell me that you both were affected at the same time.
Fungal pneumonias can occur, especially in people living in certain parts of the country.
For example, histoplasmosis sometimes occurs in small epidemics among immunosuppressed people living in the Ohio or Mississippi Valleys, especially if there has been recent construction that stirs up the soil. If you'd both been in the deserts of the Southwest or the San Joaquin Valley of California, then coccidioidomycosis would be a possibility. If you both had parrots, psittacosis would come to mind. Tuberculosis could affect both of you at once if you'd both been exposed to someone with TB at the same time, but I would have expected you to be sick for a longer period of time. Legionellosis is another type of pneumonia than can occur in outbreaks and that is slightly more frequent in HIV-infected patients.