Sometimes high lymphocytes is a reflection of chronic diseases but occasionally it can be just a normal finding. If your total white blood cell count is elevated and lymphocytes are elevated then you need further work up but otherwise you should probably be ok.
Your primary care doctor can counsel you on this.
Most of the time it goes away by itself. If not, one easy way to get rid of it is to put your finger in the affected ear and hop on the leg at the same side for a few minutes.
It's extremely rare for an infection to happen but in case of continued symptoms, visit your doctor.