A-Level/Gap Year/IGCSEs

So I've been on a gap year travelling since July 2013, I didn't do so well in my IGCSE's I got two C's for Maths and English and Biology a D and Physics I failed.

I switched from two schools, the previous GCSEs to IGCSE's I had three months to learn all three subjects before the test a whole new syllabus. I mostly focused on Maths and Bio but didn't really get good on either.

I'm currently doing distant learning whilst on the trip Psychology which doesn't need any qualifications except a C on English for it.

It isn't going as I planned, does anyone have any advice for me?
Should I retake my exams? Or go straight to A-Levels? But would I qualify for it?
I'm so confused.
Please help, I'm totally stressing over this. :|