Sam,

I hope you and your parents have discussed your condition with the relevant teachers and Guidance Counsellor at school. This will explain you have medical reasons for your struggles, ones which are being investigated.

As for homework - your family can really help you break it down into bite-sized, manageable chunks which you can handle. Get into the habit of having no distractions, no tv, phone or music and work for no more than 20 minutes, then take a break. Get up, leave the books/laptop, get a drink, discuss what you have done with family. Then go back for another session. Never overwhelm yourself.

Dave.