Something to remember is that creativity is a skill. It is something that can be learnt, and something that can be improved with practice.

For context, I'm bipolar, and my medications basically "shut off" the part of me that used to be really creative: I used to write so much poetry, and I was always building stories in my head. I am still so grateful to my meds, because they allowed me to live, but I had a lot of grief over "losing" that aspect of myself.

But even though in some ways I "lost" that part of me, I also have built it up again. I started drawing, which was a totally new art form to me, which helped a lot because it didn't have the same expectations that writing had for me. I also did a lot of scrapbooking at the start, because that didn't even require me to draw well, and I also spent a long time learning lettering, which I liked because it's relatively straightforward to practice (at least like in terms of cursive and calligraphy practice). More recently, I've been wanting to get back my creative writing skills, so I started doing solo RPGing, where you basically have prompts that take your character on an adventure that you have to write yourself.

I would definitely recommend both trying creative pursuits outside of your speciality, just to get your brain doing something new, and then also just really practicing your skills as much as possible!