Am I right to be angry at my work for not expressing condolences about my Mom?

I recently completed an overseas contract job with an ad agency and shortly after I returned, my Mom passed away from cancer. (I’m 24, so relatively young) It’s been almost two months and I still haven’t heard anything officially from my boss (who knew me well and knows she’s dead) or my company as a whole. I believe the standard protocol is to send a card or something but even an official email would be appreciated.

I think this is really rude. Am I crazy?