Don't think of it as worrying, think of it as excitement! You're going on an amazing adventure over the summer, and then you've got a great new job in September. Think about all the fantastic memories you'll have of your trip, and how good you'll feel once you've done it. I've just started travelling on my own too, and at first was petrified and made myself feel sick. I still get nervous, but it's more to do with excitement than anything else. This is why we have jobs, so we can go off and do great things on our holidays! Deal with one thing at a time- make some lists to make sure you've got everything for your trip, and don't even think about the job until you get back. Have a great hol!