Check that you are well supported and that there is no gap between your neck and the pillow. It could take five days or longer to get used to your new pillow, so you may not notice immediate relief.
One way to keep your neck properly aligned is to sleep with a cervical pillow. A proper fitting cervical pillow can help you maintain the normal cervical curve while sleeping on your back, allowing your muscles and ligaments to relax and regain their normal length.
Sleepsia Cervical pillow can also aid side sleepers by preventing unnatural bending in the neck. It will offer support where your traditional pillow will not. Your pillow should always support the back of your neck and the head.
A major benefit to sleeping with a cervical pillow is that it actually helps improve your posture while you sleep. They can also improve your sleep by relieving and supporting tense muscles in your neck and shoulders, increasing blood flow to your head.