I messed up really super badly and missed my exam
I'm studying abroad in the UK and today I had the date set for my exam and everything, except I forgot one thing, how to properly convert the 24 hour time and because I didn't convert it properly so the real time of the exam is already passed. Being a forgetful, absent minded individual, I've made mistakes before but this is extreme even for me. I already emailed my professor but I can't just contact the examination office because my excuse is not good enough. Is there anything else I can do or do I just need to accept that I definitely failed the course now?