Is a artery in my neck clogging if my blood pressure has been high for 7 years?

Maybe. Carotid artery disease is one possible negative effect of chronic high blood pressure. "clogged" vessels in other places (heart, brain, legs, more) can also occur, and lead to things like heart attacks, strokes, poor leg circulation, kidney problems, etc. However, it's not too late to do something-talk to your doc about eval & tx including healthy diet, exercise, wt. Loss and poss medication.