Would i know after a week if i had toxic shock syndrome? i'm afraid i accidentally left a tampon in 7 days ago.

Not likely: But you can still become infected. You should have a pelvic exam immediately to have the tampon removed or determine if it is even there.

Very sick: Usually fever, very high >102, rigors (not just chills like the flu), low blood pressure, low urine output. It progresses rapidly and can be life-threatening. It can come from an infection in the vagina that gets into the pelvis or from a rapidly spreading skin or soft tissue infection, that is extremely painful-not just a bit painful. Seek attention immediately.