I have a job where I have to do some things at home (preparing lessons, writing reports,...) and for some reason I constantly have severe anxiety about it. It's not just plain old procrastination - my heart starts racing and I feel sick to my stomach as soon as I start thinking about it. I've tried breaking it down into minimals steps, because I sometimes have trouble starting things. I've tried crossin off everything from my to-do-list so I have a whole day to do it, because sometimes I can't get myself to start something if I know I have other appointments/responsibilities. Nothing works. Every week I keep pushing it up until sunday evening when I'm forced to do it. Which makes my general anxiety even worse, because than I'm badly prepared for work, don't get enough sleep...

The weird thing is that the tasks themselves aren't even a problem for me. Sometimes, if I can get myself to start, I even have fun doing them. I have to do similar things for a hobby/volunteer position and I could spend a whole day doing planning out stuff for that in a heartbeat. 

It's super annoying and makes my job even more difficult for me than it is already because of my anxiety. Does anyone have similar problems and can offer some advice?