It has been months since I ever stood up late but now since I'm on vacation from work and spending time with friends very late, I'm starting to notice out of nowhere when I tried heading off to bed to sleep for the night, I'm experiencing chest tightness, head pains that feel like little needles stabbing my head very uncomfortably, numbness on fingers and feet and feel like I might stop breathing. Is this anxiety? I haven't experienced panic attacks for such a while but what can I do to calm down and go right back to sleep?