I have a long history of mainly anxiety and panic attacks with a side order of depression and ocd - yay! it's great to me. 
Anyway, the anxiety and depression have been under control for a good while now. Before xmas I was taking anti-depressants and beta-blockers for post-natal hypertension. At xmas GP said blood pressure was no longer an issue so I stopped taking the beta blockers. I have been fine since and do not feel particularly stressed or worried at the moment.
2 nights ago after I'd been asleep about 10 mins I suddenly woke up 'panicking' - raising heart, very dry mouth, sweaty palms. It was as if someone has come and shouted 'boo' in my ear and scared the crap out of me.
. But when I got up for a drink I didn't actually feel panicky in my head. The same thing happened again last night and after ignoring it for an hour I got fed up and took a beta blockers which stopped the symptoms and let me sleep.
Now I'm too scared to go to bed tonight cos it's like a self-fufilling prophecy. 
I have got my period at the moment so I'm wondering if the hormonal imbalance has got to me and made me feel more mental.
I'm tired and scared now as I had years of uncontrolled panic attacks and anxiety and I can't bear the thought that it could all be starting up again.