Check if you're overweight (check BMI and abdominal circumference) and also assess how's your sleep quality. If you snore too loudly, feel unrefreshed in the morning and specially if you're very sleepy during the day - chances are you obstructive sleep apnea. Aside from losing weight and sleeping on your side, inquire about having a sleep study. Obstructive sleep apnea isn't just about snoring and sleep. It can also greatly affect your cardiovascular health.