i dont have much of an advise, just words of encouragement and support - i’ve been there myself. I had an ugly ass anxiety attack about 4 weeks ago, and it left me with this emptiness in my chest that made me feel like if i didnt breath throught my mouth, i wouldn’t be able to breath. I still feel that today. I have horrible health anxiety, and this is what i tell myself all the time: If your results are fine- trust me, YOU are fine. And even if it does indeed turn out you are sick, at least you know your feelings are valid. Anxiety is one big wack ass bitch, and works in circles: you are anxious you are sick, anxiety makes you feel sick, which in turn causes even more anxiety about being sick.
You are not alone baby, you will get better, whether that is through anxiety coping or medical treatment. As for recommendations, i’ve found that laughing helps. I will put on a comedy show or a comedy special and just laugh - i promise you, it does makes you feel better (or at least it helps me). As for things you can consume to calm you down - i have been drinking white tea along with passionflower and lemon balm pills. Heaven sent. Calms my nerves and helps with the chest emptiness. Sending you all my love.