Only half my throat hurts and I have only one swollen lymph node?

Hey everyone. So only the right side of my throat hurts (the pain is pretty bad when I swallow, but if I don't swallow it's just a dull ache. If I talk, it stings a little bit, but not a lot) and the lymph node on the right side of my neck is also swollen. I don't have a cold or anything. Also, if I swallow, I feel a very light pressure in my right ear, but it's extremely minuscule. Any idea what's going on? I had something similar before when only one side of my throat hurt and BOTH my lymph nodes were swollen, but it went away after a couple weeks without medicine. Anybody know what this could be? Thanks!