One month prior to your GCSE exams isn't really an excuse unfortunately, especially as most of that would be study leave at most schools. If you'd had to travel that much all year round it might have been understandable.
I'm not looking to be down on you or anything but it sounds like you are making excuses for your grades and not very good ones at that. And if you didn't study for it then it does raise serious questions about how serious you really are about this whole 'I'd rather die than not do what I desired to do.' You would rather die for it but you couldn't study for it?
Also, when it comes to medical school, it's very competitive so the whole question of 'desire' is off the table. Medical schools often get 10 applicants competing for a single place and it's about them choosing you, rather than the other way around. Why should they pick somebody who claims to be committed but makes excuses like 'I had to travel too much' and 'I got Cs because I didn't study hard enough' over somebody who has the grades and says they're committed? The other person has something to show for it; you don't (yet). You have to put yourself in the admission tutors' collective shoes and then maybe you'd see what I'm trying to say.
It really is in your best interest not to pursue this route because A-levels are difficult. Very difficult. And somebody who doesn't get the top grade at GCSE is likely to flunk them completely. I'm not saying there aren't cases when somebody got a C at GCSE and came out with an A/A* at A-level but those are the exception, not the rule.
Regardless, there are other routes into medicine. You could do non-science A-levels and then join one of an increasing number of widening access programmes and foundation year medical programmes which are geared towards people with non-science A-levels. The grade requirements for these are the same as for the regular medicine courses and it's often stipulated that people with science A-levels are ineligible to apply so a full set of humanities is probably to your advantage.
If that doesn't work, you can get onto a different degree, probably Biomedical Science, and pursue graduate entry into medicine. However, you should use this as a last resort as it will cost you more time, more money, and more hassle/competition than regular medicine.
Lastly, several medical schools accept Access to Medicine courses but that's really only for mature students I think. It's not specified but you could pursue that if your A-levels don't go as well as you'd like. One obvious medical school to avoid in that event is Cardiff, as they specifically state that they won't consider applicants who've undertaken additional Level 3 qualifications having failed to get the required A-level grades.
Good luck.