please dont drop out,i did and totally regretted it,i had to take home courses(very hard and very expensive!)i think you should print of some information about social phobia off the net and try and build up the courage to show your mum. I dreaded telling my parents but im so glad i did in the end because they have been very supportive. Also you may benefit from going to the doctors and seeing what he suggests,but the first step is to def tell your mum.