Well, i am a 16 year old female, and lately i've been experiencing major weight loss, my anus has been itchy for the past few weeks/accompanied by diarrhea, and i have had to pee very frequently in one day. and today, i went to the restroom and it seemed like i pooped blood and mucus?(clear stuff) I know it isnt just my period because i am off of it and not supposed to start any time soon. know what it could be?