Kind of freaking out

Everything is just so stressful right now In order to pass my junior year, I'm going to have to have six credits from  school next year, but what if I'm not taking six classes? Where am I supposed to get those two extra credits? I really don't want to have to repeat my junior year. Can you say embarrassing? I just worry about that. I'm also freaking out over my visa. I'm supposed to leave in a month and they say it could take up to a month to get the visa. I don't even know if my travel agent has recieved the paper work yet. I'm ready to get my exchange started  and I hope my visa isn't holding me back.