Is it normal to get strep throat after sucking your bfs dick? Vivid detail sorry

So my boyfriend and I started having sexual dates about three months into us dating. I would suck his dick when we had the chance, he would eat me out while I sucked his dick, but the weird part about it is that my throat was kinda sore after, but I just thought it was cuz he would fuck my throat basically. Well about a week ago (less than a month after we started having sexual intimacy) my mom took me to the doctor because my tonsils were swollen and my throat was sore and red and I had white puss on my tonsils. The doctor said it was strep throat. He prescribed me amoxicillin. Well even after making out with my boyfriend he doesn’t have it. And the only thing I can think of of why I have strep is because of sucking dick. We have had sex multiple times and and we have used condoms and I’ve only had to buy a plan b pill once. And even that I don’t think he came inside me but hey it’s better than being pregnant at my age.