I Think I Have Forgotten A Tampon In Me As

I think I have forgotten a tampon in me as well. ..foul odor after sex an crazy clear discharge. .funny feeling in pelvic area...trying to feel around for it..can't find it getting scared...first thought i was paranoid. .until the discomfort and foul odor...it's been three week's an I have been having sex. ..I think it's to far up