Iâm pregnant and have had a blood test for chickenpox. The blood test can show that you: 1  Are immune (have already had varicella disease or varicella vaccine) and have no sign of recent infection. You have nothing further to be concerned about.  Are not immune and have not yet been infected.
Causes of acute insomnia can include: 1  Significant life stress (job loss or change, death of a loved one, divorce, moving) 2  Illness. 3  Emotional or physical discomfort.  Environmental factors like noise, light, or extreme temperatures (hot or cold) that interfere with sleep.
Common causes of insomnia include: 1  Stress. 2  Anxiety. 3  Depression. 4  Medical conditions. 5  Change in your environment or work schedule. 6  Poor sleep habits. 7  Medications. 8  Caffeine, nicotine and alcohol. 9  Eating too much late in the evening. Drinking coffee in the late afternoon and later can keep you from falling asleep at night. 2  Nicotine in tobacco products is another stimulant that can cause insomnia. 3  Alcohol is a sedative that may help you fall asleep, but it prevents deeper stages of sleep and often causes you to awaken in the middle of the night.