Checking track first might be easier - you're not around all of your friends, others at your school, teachers etc. You can just check it on your own, or with your parents or whoever, without the added pressure of being around everyone else.
It also means that your actual grades will have less of a significance, which may help you prepare for when you get to your school / college and open them.
But just remember - if you do not achieve the grades that you are aiming for, you are not worthless, and no one will be disappointed in you. They do not define who you are.
If you're worried about uni, then there are many choices if you don't get into your firm / insurance choices - for example clearing, or taking a gap year and re-applying. Not getting in to your firm doesn't mean that you have failed or that your are worthless.
You are not worthless and your grades do not define who you are, however much you feel like they do right now. If you are disappointed on results day, you must remember that this isn't the be all end all. You have many other options.