PCSLife,

I would suggest having someone watch you sleep. I bet you have very different sleep periods on the nights before your bad days. Lack of REM sleep will leave the brain fatigued from the previous day. Plus, over-doing it can sometimes take a day or two to hit you with a bad day.

Any gasping for breath or slowing of breathing will indicate sleep apnea can be exacerbating your PCS. Neck position can cause breathing irregularities.

Sleep clinics do not help much with this because they only observe one night. It takes many nights to begin to understand the irregularities of breathing.

For those who can afford it, you can buy pulse oximeters that you wear while sleeping. They can record your O2 blood levels and wake you if they fall below acceptable levels. They can also be rented with a doctor's prescription. They cost about $250 and up to purchase.

I'd like to get one some day. $$$$$