Stinky lady part

I’m on my last few days of my period. Usually I wear the diva cup but 3 days ago when I took it out, it didn’t have anything so I assumed that was the end. I went about my day & when I went to the restroom, I realized it was just spotting but it smelled SO bad. It was to the point where I couldn’t open my legs because I was afraid others would smell. So I got home, showered & washed down there (I used soap but only on the outside). The next day, at school it started smelling again. This time less but still strong. Same thing. Went home, showered & today, I’m wearing brand new panties. Since I usually only bleed brown for 2 days at the very end of my period, I didn’t wear a pad. I’m currently in the restroom & noticed that I had brown blood on it. Then, the smell hit. I’ve never had this happen before. What’s going on?