Should I drink something to calm me down, is there something for nerves/anxiety?

I can't believe I'm thinking like this.. I've never wanted to depend on something or consume to something to feel a certain way. I've always thought it's just a state of mind and tuned in to meditation,calm music. But, this is something serious. I know the fear I have, I am making it bigger than what it ought to be but I can't help but to feel this way.
My husband said we can go practice a little tonight before tomorrow, its going to be at night time but at least I'll have some wheel time before driving alone tomorrow for my first time here. I hate that while driving I am surrounded by other cars/people and they have no idea that I am yet learning, so if I drive too slow or make a mistake they pressure me. Everyone else seems to confident and at ease, I know we all have to start somewhere and no one is born knowing, but my mind gets the best of me..it fails me at times when i get nervous as it just literally goes blank. I just want to be peaceful about this.. and it's not only this, now my anxiety is escalating to other things like when I am home alone I fear, walking to the market as well. It's not like hey, well if you get anxious while driving try walking.. because even going out I feel anxious..It's not even because of the new city and the fact that I dont know many people here, ive always been a nervous person sometimes more than other times..just at things I tend to fear..