Headaches...still?.....again?????

After I feel the other day Ernie kinda freaked out. She is concerned, justifiably so, about me riding the bike. Seen the doc again today, I did not even get a chance to say hello and she had already told him this is not gonna fly anymore. Have been having these headaches/light headedness for a while now. They scheduled me for another ECHO (?) of my heart and some other test to check the blood flow in my carotid. Also did an EKG.....and told me that my heart rate is slow. He told me that he was to run the other tests before saying anything, but based on my family history of strokes it is kinda pointing towards some sort of plugged arteries. If anybody who has had this carotid test done would not mind talking about it, either here or in private I would greatly appreciate hearing from you. Not the least bit nervous, just kinda wondering about it.....Thanks....Doug