I was exactly the same. Worrying about having your acceptance confirmed or rejected is extremely nerve wracking, and stressful. But for anyone feeling like this please try not to worry too much.
If you don't get the results you had hoped for it is not be all and end all, and there are many options for you to choose from. Take me for example, I didn't have the necessary qualifications to be accepted onto a BA course - and two years later here I am going into my final undergraduate year. I was offered a foundation degrees and they are brilliant - you learn nothing different from students who are on the BA programs. Just that you can graduate at the end of the second year, and by working your best you'll be able to go onto a top up program.
Clearing is also something to consider - many of my friends started their courses as a result of clearing. Now is the best time to start searching and registering for clearing options. I haven't gone through this process myself but there is alot of information on here, as well as UCAS. Calling up the university to get some advice will also be a great help, speaking to someone within the marketing and admissions teams will be informative and the people who work within these departments will be able to give you as much advice as possible.
Don't worry on your own, have a look through your options and receive friendly advice.
Hope this helps anyone worrying about uni acceptances.
who are introverts?