I'm going to quote in Tank Girl now so she can move your thread to the right place if it's needed.
I have and will be doing Physics again.
Maths I have done A2 with AQA and will be doing AS Further Matgs with Edexcel.
Never did biology.
All sciences done with edexcel though
(and a b in AS History in y12)
During Y12 + 13 I had health problems followed mental health problems. I finally got treatment for the mental health ones May of Y13. It is going well (although ongoing) so I kind of felt I owed it to myself to retake physics as really I can do better. The same could have been said about Chemistry but as I wish to read physics I reverted to plan A which was
AS+A2 Further Maths + Retake AS+ A2 Physics.