No qualifications at age of 17 because of mental health issues. What should I do?

I'll explain first.
I moved here year ago. It was beginning of the Year 11. (I was born in 1998). I've been struggling with depression for past three years. I was home schooled back in my country. Unfortunately, my father got promotion and we had to move. Like I mentioned before it was beginning of Year 11. I was advised not to go to school the year I moved here because it was last year of secondary education and the exams. I knew I wouldn't be able to do it at that time because I was affected by the fact we moved etc. I struggle, there are periods when I'm okay and live normal life but also there are days when I can't leave the house and therefore I know I wouldn't be able to concentrate enough so I can pass the exams. I waited. I'm okay at the moment. I'm getting the help I need. My life really changed and so did I. But I'm 17. And this is the time when I should be studying. I should be doing my A Levels right now. But I haven't even got GCSEs.
I would need an advice. What should I do? Or rather what can I do? What are the possibilities?
Can I still do GCSEs this year? Or
Should I do GCSEs next year? (I'll be 18 in October)
If so, what I need to know? Etc.
What after GCSEs?
OR IS THERE SOMETHING ELSE THAN GCSES?
I heard there's Level 2? For example LCF Diploma in Art & Design? Then there's Level 3.
Can someone explain it to me?
I want to study Fashion Journalism. My dream would be to get accepted to study at LCF. But right now, I feel like it's impossible. I'm so far behind. But I try to stay positive.
So I'm asking anyone who could help me, explain it all to me and sort of show me what are the possibilities.