Health anxietg

as anyone gone through really bad health anxiety where u think what u have is the worst thung imaginable

I have had strep off and on since November, I recently got tested positive for the flu last Monday I’ve been feeling better until 2 days ago I started getting back pain and that feels better w walking but I have started to get neck pain and earlier I got dizzy and nauseous my anxiety is telling me it’s the worst and I already saw a dr yesterday :( I guess what are some way that help u relax though health anxiety