@kmar123 Echoing others who have said that the first few runs after a long break (or ever) are definitely the worst. If you stick with it and especially if you integrate the advice to start slow, warm up, and incorporate some strength work, it should start to feel better.
My own breakthrough with running happened when I realized I was breathing all wrong. No matter how much or how little I pushed myself, I felt like I as constantly gasping for breath and unable to fill my lungs. I read this book called “Breathe” and went down a Youtube rabbit hole to learn everything I could about diaphragmatic breathing and it was worked wonders for me! I now know how to actually breathe to fill my lungs, help my nervous system regulate itself, and avoid habits that before would trigger panic, which would make everything worse.
So definitely look into diaphragmatic breathing, and practice it daily, both at rest and when you run.
Fun fact: the pelvic floor muscles and diaphragm sync with each other, so if you have any known or suspected pelvic floor disfunction, that’s definitely something to look into on its own merits, too!