Hello Friend, Good that you are seeking a help here. As you noticed such behaviors are change from your original character, then definitely something in between would have caused such emotional change. May be career or job related, relationships related issues or lifestyle changes could have triggered such change.
Better take a professional help to analyze and assess yourself to find a right solution to recover back.
Next Steps
Consult a psychologists directly or online. Feel free to reach out to me online through Practo app for further detailed evaluation and suitable solutions that you can follow practically to overcome this problem. Be positive. You will be alright soon.