Try not to take things for it (as long as it isn’t getting worse) as it could interfere with the meds they give you, but as far as I know its only if you have a temp that they wouldn’t go ahead, or if you were really ill. There were a couple girls who had colds when I was getting mine done who said they went in with a cold and came out without one lol. Try and rest and hopefully you will be right as rain 🙂 Good luck xxx