STD?‼️

Me and my fiancé are in a committed relationship, haven’t and do not plan to have sex with any other people. We are both currently and have been clean. I’ve had an STD prior back about 4 years ago. I was given medication and a shot to be sure it was taken care of. I remained clean and have been fine since then. I’ve had only 2 yeast infections and one urinary tact infection (I used to hold it a lot, I have PCOS and it causes me to constantly want to pee) All were treated right away. I do try to eat healthy, I do keep good hygiene (it’s a must!) and I also take vitamins and supplements for my bladder and overall health. My fiancé tries to stay fit and healthy as well. He hasn’t had any problems or ever any infections or sex with other women. My question is, even though we are both currently negative for any STD’s or infections, are we still be able to catch one?? I’ve taken health and sex Ed of course in high school but I want to make sure and get every aspect or angle it🤷🏻‍♀️ could an STD still some back ? Or could we cause an infection between us? Usually people recommend to get checked annually but I’ve gotten tired of being probed by doctors down there and getting poked for my blood. I could just use some basic advice. Please no negative comments💯