Systemic hypertension and tachycardia (high blood pressure and fast heart rate) are common when there is a head injury. Whenever there is a head injury in an ER, especially with loss of consciousness the blood pressure is monitored very closely during the first 24 hours. The absence of high blood pressure, however, does not necessarily mean there is no swelling or bleeding within the brain. There are many "missing pieces" to this story. In an auto accident, especially when there is a blow to the skull, an immediate visit to an ER is prudent. Presumably, there had been a head injury. If there has been loss of consciousness, most hospitals in the United States mandate a 24 hour stay for observation. There is a window of opportunity in which to reduce swelling. Another reason for an ER visit is to evaluate possible damage to the cervical vertebra, which can be fractured from sudden flexure. If she has not been to a physician and had a head injury go immediately to an ER, for purposes of insurance coverage and peace of mind. Her blood pressure is a bit low, and I would like to know what it normally is. The low blood pressure requires an evaluation. It may or may not be a problem. Probably nothing seriously is wrong, but if she has not been evaluated by an in-person physician in an ER, go there immediately.
All I can say from your results are that her BP is very low and heart rate high.Does she normally have low BP? . The migraine may be damage to the head if she hit her head or twisted her neck damage to the neck. For some people they have very low BP. But I would talk to a doctor about this.