Mid-stage PhD student lost motivation
Gamification of your time-management method maybe an answer. Gamification is the latest trend in the Internet that involves putting game elements to motivate users to engage more in a website's activity. First of all, you can set experience points to each task, and exp requirement for each leveling up, badges for completion of tasks. Be sure to take care of your health while you do this.

About anxiety, procrastination and other symptoms, there are a number of reasons:
(1) The slow monster
(2) The not-believe-in-future monster
(3) The exhaustion-of-thoughts monster
(4) Nightmare and risk monster
(5) Anger monster
(6) Crying monster
(7) Self-restriction/limiting monster

So, these are the monsters that you need to fight in your adventure. If you can fight off them, high chance you will be able to finish your thesis. Good luck!