Yesterday I noticed a very tender lump about the size of a bean on the right side of my neck which seemed to get bigger the more I messed with it. This morning it is still there and still the same size. It is also visible you can see the lump poking from my neck. I also have a very very dull pain on the right side of my throat as well. No fever aches etc. I am concerned. This happened a day after performing oral sex on my girlfriend and I am wondering if this can cause something like this.