Looking for help please 4 year old daughter

Hi i am a mum of 5 my youngest is 4 years old I love me children with all my heart they are my work I work past time and been with my husband 10 years married for 3 years in September. My daughter and consent routines can't be broken. If a problem come up and she as one of her moments and walk away of leAve the place where it start weather it be 5 mins or 5 hours she will not calm down we have to go back to that place for her to stop and it like nothing ever happened. She's full on demanding 24/7 she's doesn't sleep well she very clever still waiting for hospital which as been a nightmare I don't want a label for my daughter I just want to help and understand her if heartbreaking seeing the state she can get herself him