Need to vent ashamed to be feeling this way

I am a mom to a beautiful 2 year old girl.... she got a virus recently and since then has been an absolute nightmare! Constant tantrums, throwing herself on the ground banging her head. No matter what I do or how calm I talk to her she wont calm down!!! It’s been a week of this and I feel so sad and disappointed in myself because I dread her waking up in the morning or her waking up from a nap! I love my child more than anything but I really don’t like her behavior right now!! She used to have tantrums here and there and quickly get over them but now its at a level 20!!! I am posting anonymously because I am super ashamed of my feelings, I miss how my daughter was before her illness!!