panic .... :'(

soon after Melissa left showroom, customers came and told me they wanna make a deal. i felt "oh my gosh" and got panic. i called Melissa and ask her to come back. and she did. she took order. i was just standing at the floor.......
i felt so bad about myself. i can do nothing. i just sitting at the table in the showroom and cannot take order. i don't know what i'm doing here and what i've learned here. i need to be more keen and try everything that i can. i'm so sad. so bad. so damn.
i have done seceral kinds of things since i came to the US, and that sounds nice. KQ, shadowing, GSTS. but i don't feel any progress in myself. i just learned how to avoid making trouble with English speaker...i just learned to say "hi, how are you today?"
it just ....SUCKS !