I have 70 0/0 narrowing of the carotid artery. after doppler test.?

i am on medicine tidliem, and atorvastatin, also aspirin, and that is it, i thought, .that i would be a candidate for surgery if i was as much as 70 0/0. narrowed, i dont have tia, symtoms, but i do have terrible tiredness and no , no energy, at all all i want to do is sleep all day, but it looks like docs are now just going to leave it, as it is on medication, what else can i do