Plz help!!! this is driving me nuts, it seems like i can go to a mall, where i live and not have any anxity at?

all, but if i were go to some place else, like another town or city, i think i would get really nervous, around people i don't know.. .. but when it comes giving a presentation say like in school, i would avoid it at all costs, because i would get extremely nervous, i would avoid going to bars or clubs when there is a lot of people say like going to a dance where it would be packed with people, and one more thing last year i went and did my road test, and before i got in the truck and saw the driving instructor i got nervous, and when i did get in the truck, my hands started to shake my heart was pounding and i ended up failing horribly... does this sound like social anxiety or can you have some parts of social anxiety but not all...also i get really nervous and my hands tremble when i have to do stuff in front crowds of people