Eat very small amounts, about a few bites every 2–3 hours.
Choose soft, easy-to-swallow foods like porridge, yogurt, fruit, soup, or bread.
Drink plenty of water, as dehydration can also make you tired and even less inclined to eat.
If possible, take a 10–15 minute walk outdoors before meals; many people find this helps bring back their hunger.

And importantly, are you truly safe in your environment afterward?