not ready

today i spoke with a representative for my dream clinic to work in. i guess i have another interview with them on monday in person this time instead of on the phone. i was so scared, i have no experience with interviews and jobs. i think i shouldnt have asked to have the interveiw next week because she sounded like she wanted it to be this thursday=( i screw up everything because she probably also sees me as being unreliable from all the questions i was asking her about who to call if im late and how to get their. but maybe im just psyching myself out. i just wanted it to be later because im having a horrible week and i dont want to go to the interview looking miserable [i cant hide it apparently when im down] plus i need to take the bus to clinic first so i know how to get their for the interveiw incase i get lost. and im just assuming i go to the front desk when i finaly find this clinic because she never told me and i forgot to ask=( does anyone have any advice for interviews? and did i come off like a unreliable person, or was i justified to say next week? ...she asked me what day worked best and i was just honest with myself.