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.
Causes. Common causes of insomnia include: 1  Stress. 2  Concerns about work, school, health or family can keep your mind active at night, making it difficult to sleep. 3  Stressful life events â such as the death or illness of a loved one, divorce, or a job loss â may lead to insomnia.ommon 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.