Scared of swollen gland!

could someone biting your neck cause a lump in your neck, or could it be a swollen gland? About 4 days ago my friend was kissing my neck, then decided to bite me on the right side of my neck.It was sore that night and the next day I noticed a reddish bruise and a lump where he had bit me. I am constantly feeling my neck for swollen glands, but until now have never had one. I am so worried that maybe the bite did not cause the swelling, but I had just accidently discovered a swollen gland. The lump is located about 2 or 3 inches below my ear towards the bottom side part of my neck.Should I be worried? Does constant pressing on ot make it worse? PLEASE HELP!