I'm no expert on sleep by any means but when this happens do you have a sudden jerking/ falling sensation just before you jump into the panic attack?
I ask this as a read a book this year from newscientist by Graham Lawton called This book could save your life, it has a chapter on sleep and in this chapter it describes how we sleep, starting with NREM sleep - stage 1 of which can involve hypnagogia (hallucinations and lucid dreaming), part of stage 1 can also be hypnagogic jerks, involuntary muscle spasms, this is where scientist think the falling sensation as you doze off some people experience may come from. I'm wondering if this might cause your body to panic and trigger a panic attack?
Even if this isn't the cause do you have a good sleep regime? It could just be your mind is still buzzing away which is stopping you from falling asleep. A couple of tips from the same book - your bedroom should ideally be around 18ºC, Keep your home dimly lit for at least the last hour before bed, don’t use any screens for at least two hours before you go to bed, keep your environment as quiet as possible when trying to sleep (use ear plugs if necessary), try not to have any caffeine or alcohol in the afternoons/ evenings, .
Personally I would be careful around CBD, if it is just CBD it should be fine, but according to some articles I read online around 25% of CBD products tested in the USA also contained THC and THC can actually make insomnia worse.
Whatever the cause of your sleeplessness I hope you find a cure soon
