Missed school due to cancer - failed my AS

Hello , I’m really hoping someone can help me
So to cut a long story short starting around Christmas time I’ve been very sick (diagnosed with cancer but I’m fine now-tests came back clear, school know I was very sick don’t know the full story though ) which has meant I’ve missed loads of school. Before this I was doing well in school hoping to become a doctor then we went into full lockdown and my health issues started and it was all downhill from there.
Because I’ve missed so much school I’ve failed my AS chem and bio, I can’t progress onto A2 with them which means I can’t do medicine , my own personal circumstances mean I’m not able to resit the year either. I’m just so so tired. I really want my life back to normal. I’ve got extenuating circumstances but it’s done Nothing because it’s such a small percentage. I don’t expect anyone to be able to help me but I’m just so sick of all of this - like unbelievably sick and tired of it all and any advice at all would be so so appreciated.
Tysm ❤️