Vaginal Odor

I’ve been sick for a week but had already got better and felt great for 4 days. I got my period during those four days (yesterday being the last) but then on the last day I noticed a bad smell down there. I changed my tampon but found very little blood and it had only been in for three hours. The smell stayed even with a new tampon. By the end of the school day I felt sick again. After I would eat my stomach would twist inside and gurgle and I felt like I would either throw up or have diarrhea. By the end of the night my stomach felt like it was trying to kill itself and the smell was less potent but still strange. Today my stomach feels a little better but my vagina still has a strange odor. It isn’t as strong as yesterday and smells different than yesterday. Idk how the beings sick and smell would be related to each other but I have no other problems. My vagina looks normal and healthy, it’s not itchy, I don’t have discharge and I was actually recently at the gyno and have no STI’s. Anyone have any ideas?