I’d say you needed light, easy to digest foods, that looked tempting, so they would encourage you to eat.
I agree about soup, choose broths rather than heavy thick soups laden with beans & lentils. Consommé would be good, chicken or beef, serve it in a cup with toast fingers. Light tomato soup, chicken & vegetable broth, chicken noodle soup, asparagus soup.
Fish would be a good choice too, salmon fillets, lemon sole, plaice. Cook in foil parcels in the oven, or microwave with a splash of white wine, serve with asparagus tips or green beans or broccoli florets.
Chicken dishes such as chicken supreme with rice, roast chicken with garden vegetables, would also be good.
Get your best crockery out, spoil yourself with tea & cake in the afternoon, have a glass of wine with dinner. I hope you start to feel better very soon KatyMac! 