There are 3 components to sleep apnea. 1. Apnea fully stop breathing for 10 or more seconds. 2. Hypopnea shallow breathing that results in lowered oxygen saturation. 3. R.E.R.A. which is where your breathing becomes limited causing your body to work harder to breathe which arouses you from deep sleep. Would check with your doctor if they're using AHI or RDI criteria. AHI only measures apnea and hypopnea whereas RDI measures all 3. Snoring is one indication of possible apnea. Other things like excessive daytime drowsiness. General fatigue and run down feeling. Insomnia at night. Insomnia with apnea is a result of your body instinctively trying to prevent sleep knowing your breathing or oxygen levels may drop.