Being worried or anxious is a normal thing. Every person feels sad and worried when he is about to leave his loved ones or thinks about leaving. So this level of anxiety is normal. The problem occurs when the anxiety started to overlap all the normal activities and shadow your life. For example, you think your parents are going to leave you alone because they are going on a trip, then for a short period of time, you feel bad for your loneliness and become anxious. But after some time you get back to your work and start a normal life. It is normal. In contrast, if this anxiety lasts for a week or more and during this anxiety, you feel panic attacks then you must consider a psychologist.