It could be a pinched nerve, capel tunnel, or anything really. I wouldn't be too concerned about low blood pressure, as long as it isn't too low! Just go to the doc and tell him your problems, I am sure everything is fine? Do you smoke? This can constrict blood flow, so can caffiene? Just drink plenty of water all day, excersice regularly and eat right. That is all we can ever do right!!
I do drink coffee everyday - so that could be causing some of this... thanks for your help