My husband is experiencing a great fluctuation in his blood pressure. If he moves from a relaxed position in his chair or lays down, his head starts to pound and his blood pressure shoots up. The last reading was 209/84 and then when he leaned back in the chair, we took it again and it was 158/78. He has had the headache on and off all day. He had heart stints put in in March of this year. He also had to be off his Plavix for 5 days in preparation of getting an Epideral injection, which got canceled. Could being off the Plavix for those 5 days be causing this issue?