I have a questionable lump on the right side of my neck, just below my ear....?

It currently isn't painful to touch; however, it was a week ago. And during that period, when it was painful to touch, I thought I had a UTI, to which my doctor said was just urethritus. As well, awhile ago (a month or so), I was sick for about a week and a half with a cold, sore throat, dizzy-ness, ...etc. As of now I feel completely fine, but it's still there. It appeared about four weeks ago. Also, I would like to add that it has actually gotten smaller in size. Other than that, there has been no other change. I think it's probably just a superficial lymph node that was swollen, because of my recent ailments. But I am a bit worried, because this black mole appeared on my foot. It's compeltely symmetrical and tiny. So it doesn't really fit the description of a malignant melonoma. I don't tan at all. So I guess I am just really paranoid, especially because the mole appeared right about when I was getting worried about the lump on my neck. I am 17, by the way. I just need some reassurance. I did tell my mom and dad. And if they think it's worth checking out, I'll definetely go to the doctor. I am just extremely worried.