Fecal body odor

Does anybody else struggle with this problem? It started around my 9 grade year in highschool and I’m a junior now and I still struggle with this. I’ve tried pills that help with going to the bathroom, I used to sit in apple cider vinegar for 5 minutes in the morning before I took a shower, and when I go to he doctor they always say I smell good or I have no odor, which I don’t believe. It seems that I only hear comments at school and nowhere else and when I have asked friends they say I just smell like perfume. I’ve started to isolate myself from meeting new people cause I think they can smell me and just today in one of my classes I told somebody hey and asked how where they and the said I’m at school so horrible and it smells like ass. Not knowing what to say I just laughed and turned away but all I could think about was if it was me . I don’t know what my problem could be so if anyone else has gone through this can they please help me ?