UPDATE

Surprisingly me and my family JUST had a talk. My mom was getting increasingly frustrated with my grandmother. Long story short, my grandma made me out to be the bad person. I tried to explain my side rationally and calmly and she was getting angry. We spoke about a past event and she straight up said I lied and then my mom got pissed and said, "-insert my name here-doesn't lie. When has -insert my name here-ever lied?" (I didn't lie FYI). My mom surprisingly confronted my grandma about her behavior towards me after I told her so she started the whole conversation. However, I joined the conversation when I realized that my grandma was saying every bad thing I did, but not every bad thing she did. So I joined it to even the playing field, so to speak. My mom tried explaining to her that I'm going through a lot and that when my grandma says, "What do you have to be depressed about?" it is invalidating to me and that's not right. I feel very weird about the whole thing and I don't think this is over. The tension got worse. But at least my mom said something. I'll see how things go from here.

Still, any advice is much appreciate though.