How to free myself from worries & anxiety?

These past few weeks have been rough. There have been sudden deaths of people I know, news of war, and unexpected road accidents. All of these have triggered my anxiety. It has affected my sleep and the way I live day to day. I find myself constantly overthinking. Whenever my husband travels, my anxiety worsens. My mind fills with fear, and a flood of negative thoughts takes over. I keep replaying bad situations over and over in my head, even when I try to stop. Sometimes, the thoughts become so overwhelming that I feel like I want to bang my head just to make them stop. They are thoughts I don’t want, yet they keep coming back. I feel trapped in this cycle, and all I want is to escape from it.