Ask your doctor if you should take Melatonin to help you sleep. As we get older, we don't make enough Melatonin and become sleep deprived.
Stress, anger, unhappiness, sleep deprivation or any other reason may trigger anxiety & the symptoms can be many including feeling of ants, muscle twitching, pinning,, undefined pain etc.
Most drugs can help part time only.
Find out reason & change lifestyle (include friends, sports, reading, learning, hobby)
May i suggest you tell your Family Doctor what you are going through , he will help you with your skin problem and your sleeping , take care ,