Good Morning James,
I suspect you may be experiencing nocturnal anxiety.
Anxiety attacks that take place while sleeping, also called nocturnal panic attacks, occur less often than do panic attacks during the daytime, but affect about 40%-70% of those who suffer from daytime panic attacks. Nocturnal panic attacks tend to cause sufferers to wake suddenly from sleep in a state of sudden anxiety for no apparent reason and can have all the other symptoms of a panic attack. The duration of nocturnal panic attacks tends to be less than 10 minutes, but it can take much longer to fully calm down for those who experience them.
Try to relax in the evening before bedtime. Watch a funny movies, avoid discussing stressful topics, do not eat late in the evening and remember to use all the skills you have used in dealing with your anxiety.
Always remember that anxiety attacks can be controlled; it helps to maintain a positive attitude, control your anxiety attacks don't let them control you.