As a preface, I would like to explain that have ADHD and anxiety issues and tend to be very slow at writing (mostly due to overthinking/over-analyzing and having OCD-like tendencies when writing). I also made the dumb decision of not going into academic services to ask for accommodations (partly due to anxiety).
Due to the stay at home order the exam for my class was changed to have only written response questions (thankfully the professor changed it to open book). We had the whole day to work on it but then it was time to turn it in, I had only a third of the questions answered. Yesterday I received an email asking about why the exam was sent incomplete and if I sent the wrong one. I had a minor anxiety attack and made a unwise decision of avoidance. Today, I am trying to write a reply to my professor's inquiry and have no idea how to explain it. I'm worried that my professor will think that I don't care about the class and that I'm slacking off.