Worst part of anxiety is physical symptoms

Recently, kind of randomly, my anxiety has skyrocketed to a debilitating point. I haven’t felt this terrible in years, and I don’t understand why it came on so quickly. I am having some problems in my relationship and am starting a new job but I don’t feel like I’m super stressed about either of those things. My main symptom is just constant aching in my chest. Also constant nausea and just feeling so anxious about nothing in particular that I burst into tears. I can’t enjoy anything anymore and can’t even talk to people normally. My voice shakes every time I speak and I overthink everything. But by far the worst part is that constant ache in my chest that only goes away when I smoke. I thought I had outgrown anxiety like this, I’m just so confused and scared and feel powerless because none of my usual coping methods are working. I don’t understand why I feel so anxious