When you say 145 kg did you mean pounds? Bc that translates to over 300 pounds, which is morbidly obese.
That said, do you know your BMI? Body mass index determines how healthy your weight is. Should be between 18.5-24.9.
Here's a calculator link if you'd like to see what yours is:
http://www.nhlbisupport.com/bmi/bminojs.htm
Of course, no matter what your weight, it's not a good symptom that you're not eating. My first instinct, in light of your other issues, is to suggest that you may have depression. You're concerned about the fact that you have no appetite, which isn't that congruent with the trademarks of an eating disorder.
You'll also want to rule out a physical ailment. A key sign that someone isn't physically well is loss of appetite, as well as lethargy. These things can lead to feeling depressed. That's even the case with animals. I know when my dog stops eating and sleeps all day that she's sick. One place you can start is to take your vitals: Take your temperature and resting heart rate. Sit down and do a complete body scan. Focus your attention on every part of your body, one part at a time, external and internal, and ask yourself if you have any pain or if that part feels unusual.
Of course, see your general pratitioner. Don't be afraid to investigate with professional help.