Having An Anxious Day Where Everything Is Bothering Me At Once

Seeing my mother go through chemo treatments to treat her cancer, being there for her emotionally, being there for my girlfriend emotionally with what she's going through, being there for myself, focusing on work, making time for friends, it's all causing me anxiety and I don't know how to balance it all out. Today... everything is just hitting me like a brick and I cannot stop overthinking everything that is causing me anxiety. I have an Ativan perscription to take as needed for panic attacks, but would what's going on be a reason to take it?