Autophobia
A phobia for ventilation in toilets is not normal and has no specific name.
Yes, the phobia of being laughed at does exist.This phobia is called gelotophobia.
Social Phobia is the phobia of embarrassment. It is the phobia in which a person is scared of being bullied.
normal
Social phobia includes the fear or phobia of having no friends. Individuals with social phobia have a strong fear of being judged by others and of being embarrassed.
Menophobia is the name of the phobia related to the fear of menstruating it's called being a teenager. it's normal. once you get it, you are relieved. Instead of fear you just dread getting thereafter.
Theophobia- the irrational fear of a god or deity. Remember its only a phobia if its an "irrational" fear, a normal healthy fear is not a phobia.
Hypnophobia is the name of the phobia relating to the fear of being hypnotized or in a sleep
Indeed the fear of relationships is a recognised phobia.The phobia of being in a relationship is called Philophobia.
Social phobia or social anxiety disorder
There does not appear to be a phobia term for the fear of being confused. However, phobophobia is the fear of being afraid.
Eremophobia is the fear of being alone. Autophobia/Monophobia is the fear of oneself and/or what you are capable of doing if you are alone.