What Does Painful, Hard, Squishy And Moveable Lump On Neck Suggest?

i have a very small but hard/squishy and moveable lump on the right side of my neck. it isnt near my jaw bone or anything, its on the lower part of my neck. anyways, i dont really know how long ive had this lump, it could have been since February, mid February. there was no lump, just some stiffness on the right side of my neck, arms and shoulders. nothing else hurts. it isnt noticeable unless i stretch my neck to the left, and it isnt even that noticeable then. i dont feel any symptoms. i feel fine.
i went to the doctors last year in september due to itchiness of the ears. during that visit, she said it could be an allergic reaction or a respiratory infection. could this lump be caused by that? i also have been sleeping uncomfortably for the past 4 years. i wake up with shoulder and neck pain continuously, even before i discovered this "lump." could it be my nerves that have jumbled up together? ive been going through a lot of stress as well. i dont know what this could be, please help!