I've had this stabbing pain right in the middle of my chest that I've been dealing with since I woke up one morning. It feels sharp, especially when I inhale deeply, sneeze, or put any pressure on my chest. I tried taking pain relievers and some NSAIDs, and after about a week, the pain mostly went away, but I still feel it when I move or squeeze my chest too much. It's been 3 months since then, and the day after this pain started, I caught influenza. I did visit a general doctor, but they said it might be from the flu or just because I slept wrong and put too much pressure on my chest. I'm really worried about what this could be. Could it actually be something more serious?