Breast cancer Metastasis and ozone injected directly into your arm

Hi everyone, I was diagnosed with Breast Cancer that had spread to my lymp nodes under my arm, and in front of my lungs in October. I had the surgery to remove the mass and some nodes. I also found someone who does ozone. This person fills a syringe and inserts it directly into your vein in your arm. After injection my chest feels heavy, coughing, I get very hot, I threw up once, and kinda out of it for 10 minutes. Then everything is fine. This person also recommend vitamin c IV. My question is is this a safe route for ozone? Are those side effects I listed normal?

Thank you for any help :)