Went to bed last night and it took me ages to go to sleep at times I dozed but then kept on waking suddenly and my heart rate fast . I also had a tight full feeling in the middle of chest and had to keep yawning to take a beep breath. I eventually fell asleep but within half hour woke suddenly again and this time heart rate thumping and really fast . Ended up taking a Kalma (xanax) . The that feeling in chest I still had it this morning and have felt terrible all day . Please anyone talk to me about this .