What Causes Soreness And A Lump Like Feeling Inside The Throat?

So here is the story, I had bad injection last Friday and it caused me to get a Zantac to calm it down. I could still feel it but I just thought it was going to go away. The next day I had a nerve to cough and was very sensitive to foods. Only ate soup, crackers, and yogurt. It started to die down by Monday with some upset stomach and nausea, but I was eating rice and vegetables without feeling nausea or ingestion. So Yesterday began and I ate leftover rice and some got stuck in my throat, but I wasn t choking. It was stuck right below my Adam s apple and I just drank water and ate yogurt and it went down it seemed after 2.5 hours. Today, I woke up and ate without problems. I talked to a guy for about 30 mins and my throats started to feel sore and kind of a lump feeling. I was thinking the rice caused an irritation. I just began dinner and immediately it feels like that food is getting stuck in my throat. What is going on? It feels awful and it seems like it can choke me and eating difficult.