Hello Friend, Good that you are seeking a help here. All your symptoms symptoms are reflecting deep anxiety. As body and mind are interlinked, such anxious thoughts affect your physical condition like lack of appetite, sleeplessness, nervousness, digestion issue, breathing issues and many more.
So it's better to take a professional help to assess your suitation condition in detail to identify the actual root cause causes for your anxiety. Post that you can follow suitable solutions to recover.
Next Steps
Don't hesitate to consult a Psychologist directly or online. Feel free to reach out to me online through Practo app for further detailed evaluation and recommendation that you can follow practically. Be positive. You will be alright soon.