Swollen tonsil

My question is has anyone experienced this, is this a std based thing, or what?
 -So I started a new birth control in November. I was previously on ortho tricyclen lo and Walmart switched to Estrella something. In December right before break, my boyfriend and I decided the time was right and we did it for the first time. Later in January, I noticed my left tonsil was swollen. No pain, just abnormally large. I do think this was after I gave him a bj, but not like right after. It was probably a few days later. So I went to the doctor and they didn't know what it was so they sent me to the hospital to get X-rays. Basically I went twice after that and they still didn't know what it was. I decided to google search it and apparently I had accumulated tonsil stones in the process of getting a huge tonsil. It also said there could be an infection that caused it, or it could be std related! 🙈🙊😨Help?