I feel guilty for asking for extensions

I have a chronic illness that flares up badly randomly, and my university has given me a support system that allows me to get short extensions on assignments by emailing in. I haven’t had to use it for every assignment but my disorder has managed to cause me immense pain in line with several deadlines this year. I feel so guilty having to message my course coordinator every time with the same issue and am worried the administrative staff might start to think I’m crying wolf. I can’t really “fix” my condition and no medication really helps with it, so when I get flare ups I can only rest in bed to get rid of it and hope it disappears. But I can’t shake this feeling of cheating, as if I’m getting a way out of work compared to my classmates. How can I stop feeling awful about getting these extensions?