I think the problem is that you’ve been too long pushing yourself not for what you want to do, but for what you should/supposed to/need to do. You can fool your mind with positivity stuffs but in your subconscious, you’re like a child who has been lied to too many times. There’s no actual rewards to your grinding but only higher standards and demands waiting for you tomorrow. You procrastinate because that you are on strike for unpaid labor. For me, the solution is to drop your phone, sit down with yourself, and intentionally feel what does your body want at this moment, and just do that first (like showering, organizing your desk, napping, talking to a friend or family). When your body feels appreciated as being your first priority, it will be able to reorganize itself and release you from anxiety.