Nerves

I started a new job on Saturday. nothing wonderful but its get me back into the world of the working which i have been absent from for a few months. my second shift is today starts at 2pm ends at 6pm only 4hrs easy right, wrong. for those 4 hrs i am completely on my own running the shop. no one there to help. and normally not an issue but the guy i worked with on Saturday, not a helpful guy. don't know where, well anything is, products, gonna have to give myself a crash course today i guess.
i never normally let nerves bother me, I'm a let it happen sort of person, just relax and everything will be OK. so why are the nerves there? they really are taking over. maybe my body is trying to tell me of some impending doom. Man i hope not. its only 4hrs i keep telling myself, what the hell could go wrong, well that majorly wrong in 4hrs. right? or am i just giving myself a sense of false hope?
well theres nothing i can do about it, its going to happen weather i want it to or not, you cant stop, slow down or reverse time, really really wish you could but that just a hopeless dream. just gonna have to get through it the best i can and as long as at the end of it the shop hasnt burned down then i would say it have been a good shift.
so heres to hoping all goes well and i must remember above everything, im not a dumb arse and can handle anything when i put my mind to it.