Had aneurysm coiled right internal carotid. now loud whooshing in right ear. recent mri with contrast showed all clear. any idea what it can be?

Need to be evaluated: There are several possibilities, ranging from non-threatening (including dilated veins or changes in blood flow patterns) to serious conditions (including a dissection of the carotid artery, a dural arteriovenous fistula, or a narrowing of the carotid artery). You should have a thorough evaluation of your neck and brain vessels.