Hi there Kadie2, I'm an artist as well and understand perfectly! I'm actually going through the same problem, and have found out a couple of things about it.

Personally, my ability to paint is tied directly with my emotions. I cannot draw, sketch or paint if I'm not experiencing a positive emotion in my life. I have depression, which can make things hard! Could you perhaps be experiencing something like this?

Deadlines also come with their own little gift wrapped box of problems. A feeling of wanting to create something amazing and perfect comes with the fear of messing up, which leads to not trying and procrastinating.

Have you felt that you lost the taste for creating that you had before? Like it doesn't "fill" you as much?

One quick suggestion that helps me out when I'm in a state where I cannot be in the studio is to doodle. Do a tiny doodle every day, it doesn't have to be intricate or perfect, what matters is that you're drawing. Doodle while you have coffee or while having a meal, it'll get your brain in the right mindset to work, and takes away the "I HAVE to" feeling.

Hope this helps!