I forgot to change my tampon after being left in for 11 hours I have just recently taken it out but now I'm experiencing lower abdominal pains and my vagina feels uncomfortable, why is it like this and could I possibly have TSS?

You are lucky you were able to get it out; yes, visit your nearest ER and get checked out immediately.

I haven't gone to the er yet but I'm going later today, I'm still experiencing really bad abdominal pains and now I have lower pack pains and feel like I'm going to vomit, does this seem really serious and that I should go to the hospital?

I haven't gone to the er yet but I'm going later today, I'm still experiencing really bad abdominal pains and now I have lower pack pains and feel like I'm going to vomit, does this seem really serious and that I should go to the hospital?

Yes

Serious enough to seek medical attention if yoursymptoms are increasing.