What is wrong with me?

Three weeks ago, my mom and I had an argument and since then we haven't been talking. For the past three weeks, I haven't been eating the food she cooks, and pretended that she wasn't there. She has claimed, to my dad, that every night she has heartaches, and cries, and blah blah. An hour ago she threatened or tired to kill herself, and yet, I still am not talking to her. I felt worried for a few minutes, but it went away. I thought she was just finding a way to get attention... An ambulance came and the paramedics had a talk with her. Clearly, my not talking to her is hurting her, but I don't care... Three weeks ago, I also told her to "go die..." Is there something mentally wrong with me?