Suggest Treatment For Severe Headache

Since august 2012 I have had frequent headaches and a rapid pulse sometimes with nausea This happens anytime from 2 am onwards I have had 6 x24 hour urine tests all negative I have also had an echocardiogram which was ok but have been given a cardiac event monitor Needless to say the problem hasnt happened whilst using the monitor however it is frequent if not every day I am at my wit's end as it is worrying My BP also rises when this happens I am 72 and had an oophorectomy 6 months before the symptoms started HELP!