I want to take the day off work, but feel I should tough it out, what do you think?

Alright, basically I have 10 days off for the year, but I'm not planning on staying here for more than a month. I woke up this morning with a mive tension headache and an overall yearning to NOT be on the phones all day selling cell' phones. By the way, I'm an inbound telemarketer. I recently left early last Thursday and Friday, then took Saturday and Tuesday off completely. I went back to work and worked yesterday, did great, but I feel terrible again. I know I hate the job, and just don't want to go, but I don't really NEED the extra like, 80-100 dollars for the day of work.... Anyway, I'm just wondering if you think I should call in or tough it out, and maybe take off Saturday so that I can have the weekend or something.