You may be exhibiting symptoms of an emerging anxiety disorder. Certainly, the triggers could be all the stressors and changes you have experienced in your early adult life. Quiting your job due to your distress and symptoms could be another telltale sign of an emerging anxiety disorder. It's a good idea to meet with your doctor, and therapy would be a good first option. In the meantime, please take the anxiety test to see how severe your symptoms are now, and you will also get an initial plan to address your anxiety symptoms: https://anxietyboss.com/test/
Good luck, and let us know how you are doing.