First of all, I am sorry for all the suffering that you and your daughter are having. My son had PCS from a wrestling injury back in February and was just as sick with symptoms as your daughter but had no head bleed. His CT and MRI were normal. He was worse before better and then after about a month gradually improved. He is now only having difficuty doing long periods of school work. He gets overwhelmed if he does too much but we are very hopeful he will have full recovery in about a year time. REST and support her. It is good that it is summer so she is not missing too much school, while she is feeling the worst. Every case is different in recovery but headache, dizziness, mental fatigue, irritability, insomnia are pretty classic PCS symptoms. The symptoms will improve, be patient and stay in touch.