Tiny amount of mold in car making me sick?

Hello, so recently I've had a bit of a tough situation. Around early June, I spilled a small amount of soda in my car's passenger side carpet. I was dumb and it stayed like that for a few weeks, and when I looked underneath the rubber mat there were a few small colonies of mold, no bigger than a penny. I then cleaned it up with a Bissell carpet cleaner and thought it would be the end of it. However, about 3 or 4 weeks later I started getting headaches and chest aches and just general feeling of illness. Since then I am not sure but I feel that going inside the car sets off these feelings and I end up with a headache for the rest of the day. I have since then replaced the carpet entirely with a new one but I am still getting headaches even over 1.5 months later. Anyone have any similar stories and what you did to fix it? I don't have money to buy a new car. I haven't tried ozone yet but I've heard it's a good choice.