If you're sure you want to go in 2018, speak to your college's careers advisor, your personal tutor, or any subject teacher that you think may be able to offer some advice. It might be that you speak to your Sociology teacher to find out what they did at uni and decide that you don't like the sound of it. There's also no reason why you can't apply for something totally new! If you find a course on UCAS that just sounds interesting, look at their entry requirements to see if you need to have studied something specific beforehand. If not, that's a course you're able to apply to. Get some prospectuses in from universities and see if any of the courses take your fancy.
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Thankyou so much that really did make sense but I just stress before their is even anything to stresss about and I don't know man I'm just scared and worried about the whole thing but thanks for helping me means a lot