Road2HardCoreIron

Yes, sleep apnea can thicken blood vessels and increase the risk of heart disease: 
Blood vessel changes
Sleep apnea can cause blood vessels to thicken and become stronger in response to the body's attempts to increase blood flow to the brain during apneic episodes. This can lead to reduced oxygen delivery to organs like the kidneys. 
Blood viscosity
Untreated sleep apnea can increase blood viscosity, which can slow blood flow, cause clotting, and lead to vessel occlusion. 
Coagulation factors
Sleep apnea can increase levels of coagulation factors like fibrinogen, factor VIIa, factor XIIa, and thrombin. 
Vascular aging
Severe sleep apnea can speed up vascular aging, which is the thickening or stiffening of blood vessels. 
High blood pressure
Sleep apnea is the leading cause of secondary hypertension, or high blood pressure with a known cause. 
Sleep apnea is a condition that causes periodic interruptions in breathing during sleep. Symptoms include snoring, fragmented sleep, and lapses in breathing. 

Same here and brain fog.  Memory lost ect. I wear also.