I am afraid of silly things...but i am not a coward...?

Hello....

I don't know what is happening to me...

Its been.. like.. I am so much excited when i see a missed call.. i feel my stomach heavy.. goose pimples... i am anxious.. and when a call comes from unknown number, i feel again afraid..i become reluctant to attend the calls..

similarly,i am afraid of people... because, i am so much polite.. but people in public sometimes act very ruthless.. so i am afraid of strangers.. like not seeing..but to ask thing n so on..coz i dnt knw how would they behave...

on the other hand, i am not at all afrid od darkness,night... i adore horror things.. i stay alone at home which is impossible for my parents to do and they were astonishing seeing my courage which they don't possess...

well, i just mean to say that i am not a coward... but that phone call thing... just making me feel weird.. whats that..why am i afraid of phone calls and people?

anything like phono-phobia and human phobia discovered by medical science?