Hello!
I'm one of the student ambassadors here at Coventry University.
Yes, Guilt surrounding taking sick leave is very natural, and is common amongst almost all of us. You feeling this way is not 'unnatural'. But, please remember that you know your limits more any anybody else does. And if your body is telling you it isn't able to do much more, then it Is well within your right to take the leave and look after your own welfare first. If the workplace know about your chronic illness, you have laws protecting you against them kicking you out. I'd recommend if possible speaking to them to ensure that they are up to date and understand the scope of your illness. This will give you something to fall back on IF they decide to try and 'kick you out.'
Overall. YOU COME FIRST! and you should not be made to feel bad for respecting your bodies limits, and they should respect that.
Kind regards!
Courtney H