Q. Can I have STD after nine years of sexual activity?

Hello doctor,

Nine years ago, I engaged in sexual activity with a woman. I did not take any medications and during these nine years I had strep throat once, and food poisoning once at work. However, food poisoning passed after one day, and angina after the treatment also passed other than this, I had no serious health problems. I have managed to build muscle mass as I train two to three times a week and take protein shakes. I started with 144 pounds and now I weigh 101 pounds. Recently, I discovered that my shoulder muscles have grown. I visited the doctor and he said that after nine years, syphilis or any other disease does not attack. Also due to the pandemic, I often washed my hands and disinfected them with hand sanitizer with varying alcohol content and I had orange skin burns on the back of my hand, but after applying moisturizer my hands went back to normal. Should I be worried about STDs?