Anxiety Help

السلام عليكم ورحمة الله وبركاته

I have been struggling with really bad anxiety for over a year now. Mainly about the fear of death and heart problems. I have high heart rate a lot everyday, I pray a lot of my prayers sitting because when I go from sajdah to standing up my heart rate increases a lot and it really scares me. I am also unable to do many of the things I loved to do like playing sports. I desperately want to live a non anxious life without any anxiety symptoms and being able to do pray normally. What can I do to get rid of my anxiety problems. I really need help. Also please dua for me.