no hunger

I have a problem. I have completely lost my hunger and appetite. When Covid started in 2020, I was very depressed, I lost my hunger, the feeling of wanting and needing food, completely. Until today, it hasn't come back. However, I still had appetite/cravings. Shopping for food is really hard, I can only buy groceries for one or two days because I can literally only eat what I crave, I cannot get anything else down. This was okay,, until recently. Last week me and my boyfriend broke up and I completely lost my appetite too. I cannot eat, I have to force myself. After three bites, I feel like throwing up, it is extremely hard. I've replaced most of my diet with smoothies and milkshakes since that is easier to get down. I've become severely underweight, I'm 1,73cm and weigh 45kg. I went to doctors, I went to a therapist, no one is taking the situation seriously. I eat half a sandwich a day. As long as I eat something, I consider it an accomplishment. How tf do I get my appetite/hunger back. It is really bad, I have no energy. Please send help and tips.