From personal experience, meds will never help situational depression because they don't change the situation & your reactions are a "NORMAL" response to the situation. The longer I stayed in my marriage situation the worse it got till I finally walked out.
In my case some of the silence was because he believed if he was silent then he wasn't speaking a lie (so he believed he wasn't lying).
If you can't find a therapist then maybe time of separation might be a wise idea. Shoot, my now ex wouldn't even respond to my lawyers. He was just an @$$. He was silent but the frustration drove me to yell & anger built up inside me to a very unhealthy point before I left. Don't let it get that far in your life cause it creates total dysfunction