i know that i accrue about 10 days of vacation time in a year, which i havent used yet, though i just started working at this company a little over 5 months ago, i believe we also accure 5-10 sick days which includes personal days. ive had 3 days off already for sick days, but to be honest i think it's justified as i am usually the only 1 out of 40 in our division that constantly is having to come into work 3-5 additional hours on the weekends and working past 10pm on regular weekdays. i average about 60 hours of work every 2 weeks, meanwhile the rest of my co workers, come and go as they please, none of them are ever pressured to have to work on any deadlines as i am. 
sometimes you just get burnout, tired and stressed out and you just have to take a break from being at work. ive gone to work when ive had a fever, chills and aches, i regret that, so now even if i just have a headache and didnt sleep well, i am not coming in, today is my 3rd sick day i am taking in 5 months. the fact most of my co workers also get to travel on business and business is such a loose term to use, because they will go someplace to set up an event for 2 hours and spend the rest of the time partying or having fun on the company dime and dollar really seems like they have it easy. if they want to leave the office at 3 or 4pm, they always can, but my job requires me to be there UNTIL the WORK IS DONE, especially since my boss constantly pressures me as well. he rarely notices if anyone else is out of the office until the day is almost over and it's not a big deal, if im late by 10 minutes he starts callling me nonstop and harassing me.
today ive already received 5 phone calls from him this morning. eh leave me alone.