Help!! I need to submit a Work Proposal and I am experiencing major writer´s block

Even though I have the material ready, I need to work on a draft and my mind is going blank at the moment.

I don´t know why this is happening but it´s been hard for me to concentrate these past weeks.

I am taking Levothyroxine and I don´t know if it´s my thyroid acting up and giving me this brain fog or if it is due to stress.

I am excited about this opportunity yet I can´t seem to focus on writing something that sounds ok.