Why do I feel this way during a panic attack?

In recent days, I've been experiencing sudden, more intense panic attacks, accompanied by a racing heartbeat, chest tightness, shortness of breath, nausea, and a fear of falling or dying. This is what scares me the most.

I've been suffering from panic attacks for a while, but they've increased this month, which is what scares me and prompts me to share if there's a gentle solution to relieve them.