Obviously I'm back, but I still don't know what to say, your message is too vague. I'll just say that it's normal to feel nervous, it's a big change. Do you also have to move away from home?
I spent a lot of years in college. The people I know who experienced big problems were either:
1) not in the right program, usually because they chose a field they didn't like but thought it would make them rich, or they didn't have enough information prior and the program wasn't what they thought it would be. In any case, this wasn't the end of the world, they swiched program and did just fine.
2) didn't understand that you have to do your homeworks and study to succeed.

At the beginning of my second degree, I met a girl at the orientation meeting, and she thought she could manage a full classes schedule and quite a lot hours of part time work, plus she was living away from home. It's something that's possible in some programs, but not in the one we were in (most students didn't go for the maximum of hours and they weren't working part time). To do that, she would have had to be both super talented and be willing to experience a serious sleep deprivation. Not only did she not meet either of these criteria, but she also wasn't exactly a hard worker. I guess you can imagine the disaster that ensued... :d oh:
In everyday life, I think the best thing you can do is to not fall behind in your work, or at least by very little. Usually people freak out at the mid semester exams or at the end of the semester, but I think very few people would say that they couldn't have done more in the previous weeks that would have helped make everything easier. An hour or two of reading per week doesn't seem much, but when assignments and exams are coming, those few weeks in which you skipped them will come back to haunt you.
In any case, if you do happen to fall behind in your work (very few students manage to never fall behind at one point, lol!), or if it just happens that every teacher give you their assignments at the same time, try to not freak out, do your best and you should make it in the end.

Finally, try to see how you can improve as a student. I can say that I "learned to learn" through my studies. I would often go back to see the teacher after my final exams (at the beginning of the next semester) to see what I had missed and how I could have avoided making that mistake, even if I had had a good mark. It's very telling. Sometimes I would be sure I'd miss something and I had done it right, sometimes something wasn't marked the way I thought it would and I did better than I expected, etc. I was a much more efficient student by the end of all of my years of college (I have a lot behind me!

) than I was at the beginning. So if things don't go as well as you wanted in your first semester, give yourself a chance.

I get easily anxious, but I think by now I could handle almost any class (as long as it's not in a field I totally hate and I have the prerequisites, of course).