 The study duration will be approximately four months and the study will be divided into 3 phases described below. Participants will complete daily headache diaries throughout all phases of the study, which will assess the presence or absence of headache as well as its characteristics e.g. unilateral vs. bilateral, worse with exertion, moderate to severe intensity, throbbing quality, presence of associated symptoms nausea, vomiting, photophobia, phonophobia. The peak severity of the headaches will also be rated on a 0-10 scale each day. The characteristics of the headaches will enable us to classify headache days into those with migraine and non-migraine headaches. A migraine day will be considered any day with a moderate to severe headache that has one of the following two associated symptoms: 1 both photophobia and phonophobia or 2 nausea or vomiting. A headache day will be defined as the presence of any headache regardless of its characteristics. 