So I had a cold sore two weeks ago, and it's now basically gone. I just noticed however a rather big swollen bubble just next to where my old cold sore was. It wasn't on my lip either. It doesn't hurt or anything. It's just a round swollen part underneath my lip. I had the cold sores pretty much killed one week ago and decided to overkill, so I applied a lot of stuff onto it just to absolutely make sure it was dead. So the crust was there. It fell off around three days ago. Now this thing is here and I fear I have -another fucking cold sore- despite me not being that stressed the latest two weeks. Could it be something else or is it truly a new cold sore?