Suddenly I started to cannot breath properly. Racing heart, jaw clenching etc. I cannot explain in this situation. Am I having a panic attack? I want to take my benzo but I was chill in that week. My HR in this week like 60-70 and it's also like that right now but I'm still so worried. And I'm also worrying about that if I take my benzo is my HR gonna decrease more? And I slept 3 hrs in this day maybe thats the cause but even it is I'm so scared to sleep right now. And 1 week ago a rusty metal cut my finger and I was worrying about tetanus and right now I have started to worry about it again. My tetanus vaccine shots are all done according to my mother and my government's website about health. And my last shot after that required shots was 2 years ago and according to the internet it stays for 10 years. But I'm still worrying because symptoms about jaw is the most common symptom about tetanus but jaw clenching is also common in my anxiety and I cannot differenciate them. I also have an important math exam tomorrow and I was just preparing to study and boom I started to cannot breath properly. After that all things that I mentioned has happened and I'm still worrying. Please help. Please.