It can happen in the way you have mentioned and we look at behaviors and your behavior of not eating even though your belly growls is an indication that something might be going on. There might be some benefit you derive from being thin and people noticing, even if you feel unaware of what the emotional benefit is. What strikes me most is that you say you want to eat but cannot bring yourself to do so. This concerns me and yes I would suggest being seen by your primary doctor and also a therapist to try and understand what the feelings are behind the food and eating.
Let me know if I can support you further. If all good for now, please take a moment to click on the rating tab to rate my support so that I may be credited for my time. Thanks in advance. I am here again if you need me in the future.