I had really bad separation anxiety when I was in preschool. I vaguely remember parts of it. For some reason, I was terrified the parent who always dropped me off wouldn't come back or she would disappear and cease to exist. She worked at the school and would come see me at lunchtime and I remember soothing myself with that knowledge. I think by the time lunchtime came around, I was usually over it. Anyway, there were lots of tears and apparently I wet my pants every single day in my meltdowns, but I don't remember that part. I don't remember feeling angry at the parent, just a sort of all-encompassing terror.