i had the same experience until i went to emergency
several time due to huge stomachache at midnight. my brain couldn't shut down during sleep at that period. After that i told myself it's not worth it to ruin my health. i tried very hard to forget about the work right after 4:30pm. leave things i cannot finish to the next day. it won't be the end of the world, i can only do so much each day. if you are sick, the company definitly will find somebody else to do your job. But you and your family will suffer.