I just reviews the site tampax.com and the symptoms are as follows. As kitcat1306 suggested, you should monitor yourself carefully in the next few days.
What are the symptoms of TSS?
Some of the symptoms are much the same as the flu, but they can become serious very quickly. The warning signs of TSS are:
Sudden high temperature (102 degrees F/38.9 degrees C or higher)
Vomiting
Diarrhea
A sunburn-like rash
Muscle aches
Dizziness
Fainting or feeling faint when standing up
If you have any of these symptoms and are wearing a tampon you should remove the tampon immediately and contact your doctor for immediate treatment. Tell the doctor that you have been using tampons and suspect that you may have TSS. Don’t worry about being an alarmist. What's important is to get speedy treatment.
Obviously it's possible. Even having one in for the recommended time you could contract TSS. Just keep your eye on everything, if you start to feel unwell with the symptoms of TSS, then go see a doctor right away. Please in future be careful and time when you put your tampon in - even set an alarm or reminder on your phone because it is very dangerous leaving them in for more that 8 hours.