Ah, no problem!
Yeah, so, I'm actually a first year History student. I took Chemistry for AS, but sadly got an E (I was predicted an A/B, but to be honest, there are a number of things I should have done to prevent my poor score; hindsight, ey); and I took Biology for A2, and got a C. Again, I was predicted an A, but failed one paper. I looked at these results and thought that I could never be cut out to be a doctor - surely doctors are geniuses at science? Well, not necessarily the case...I've a medic friend whose natural talents lay in the humanities and languages, and she had to work her arse off to get A*A in Biology and Chemistry at A2; she worked far harder than I ever did. This made me realise that I'm not necessarily *stupid*, I just didn't work hard enough, and I didn't address the problems I had at the time (I was struggling with anxiety/depression).
So, when I realised that medicine wasn't over forever, I looked to what I could do with an arts degree. It turns out that a few universities do accept arts students: Warwick, Newcastle, St. George's, and Nottingham come to mind. For the former three, you need a 2:1 in any degree, as well as relevant work experience, and a good UKCAT score; for Notts, I think you can get in with a 2:2. I believe there's information on this site regarding what each uni wants from its applicants - but it's a good idea to email the university directly with any questions you may have, as their requirements may differ year-by-year.
What are you predicted, if you don't mind me asking? I think Manchester, and maybe some other unis, offer foundation programmes for students who get AAA+ in non-science subjects. However, I'm not entirely sure, as I haven't really looked into this (I took a science, so I wasn't eligible).
Nevertheless, if you think you'd honestly want to do med, I'd recommend asking a teacher/adviser at school - do you have a teacher who overlooks applications? They may be a good source of info.
But if you really can't decide, don't go to uni straight away: get work experience. A local magazine, a school, a hospital, a care home - do them all, and see what you'd like the most. Then you may have a clearer path: say you want to go for GEM with a humanities degree. They like work experience, so you'll have to get sorted ASAP.
Hope this has been of at least some help