Keep a record of any instances that cause you to feel intimated. Note any witnesses. Keep copies of any relevant correspondence - received or sent. Be aware of any protocol your employer may have to deal with such instances. Contact RCN WING at any point for support and advice.
Different people are sensitive to different stresses.
If you are finding it difficult to sleep, or are sleeping too much, have lost your appetite, find it hard to concentrate and are inclined to tearfulness, you are probably depressed - see your family doctor. Depression is a treatable condition, in many cases people recover without recurrence. Medical help is essential. Work is not always the cause of excess stress, though a break may give you a chance to cope with the other things. Do not feel guilty if you need some time away from work.