Hi I Recently Masterbate Using A Banana (kinda Embarrassing) But

Hi I recently masterbate using a banana (kinda embarrassing) but upon doing that I felt as if it touched a bump inside my vagina and I saw a little spotting (spotting has stopped the same day) but now I noticed I have a foul smell and discharge, bare in mind I just finished my period 1 weeks ago and I'm not sexually active for 9-10 months, I need some help and I don't know if it's a bruised cervix or STD