The symptoms you describe like “feeling like I’m going to swallow my tongue”, panic, “forgetting how to swallow”, insomnia, “couldn’t breathe” are fairly unusual and are probably caused by anxiety. Chest pain can be due to heart disorder but heart conditions are very unlikely for people your age (late teens). Chest pain is probably caused by anxiety, too. It seems that you can stop these symptoms by taking proper medicines combined with psycho-therapy. The most frequently used medicines for treating anxiety are selective serotonin reuptake inhibitors (SSRI). You can consult a psychiatrist or another mental health professional for an expert opinion.