You'll probably be put on academic probation, and you won't get credit for everything you studied (obviously) and you'll have the pay the costs of your subjects still.
Lots of people fail their first semester, and it's completely normal, but it also means you need to reflect on your time management skills and study skills, whether you're studying the right thing, etc. There should be advisers at your university who can talk about this with you.
Then again, you might not fail. If the exams were particularly hard, scaling may be implemented. Also, you may be able to sit a supplementary exam where you can redeem your final mark. There are also many people who think they're going to do very badly, but actually do much better than expected. Unless you're sure you failed, it's probably best not to worry about it at this stage/continue to do your best.
If you only fail one subject - especially if it is outside your area - it's not a big deal, but you still need to make up for a lost subject, either by overloading, extending the length of your degree, or by doing a summer course.
One semester of all fails shouldn't get you kicked out, but you definitely need to learn from the situation or you may face the possibility of the university not allowing you to keep studying.