Continuous vomitting. Healthy foods?

My daughter was under cervical muscle spasm medications until April 21st 2024 (muscle relaxant, pain relievers)  #6 inthe morning and 6 Tabs for the night) April 22 early morning she got diarrhoea 6 times for some reason Then she became alright after taking loperamide But due to heavy energy drain, while breathing she was able to recognise little pain in the upper lining of the stomach (which we all assumed it could be stomach wounds) 2 days she was normal eating home cooked less spicy foods, coconut milk and juices to beat up the heat and stomach wounds. Yesterday again after dinner she puked 5 times in a row, then went to hospital they gave glucose and injection Then we back home again for the 6th time she vomited, whatever we put it came out even the tabs. Today we went for abdomen and pelvis ultrasound It's all normal except some small cyst detection I am very confused on why these many times she vomited draining all her energy...? will she be alright on eating healthy foods?