I am scare I have Leukemia?

I can most definitely tell you that unless your doctor has took the time to examine that section of your neck and has told you that you definitely have a lymph node, that you cannot be certain that this is one. I don't mean to discredit you but I do think that it's important to rationalize and discern between fact and feeling. If you really do feel concerned you could always see your physician. However, in this case you most likely have a lump on your neck due to a tense muscle. It happens sometimes. Often times it may be that people have signs and symptoms like you had mentioned but they can happen to people when their immune system has a weak point. Maybe you could work on some things like exercising to get your heart to gain some stamina and strength and also balance your diet to feel like your system is clean.

Don't fret too much! It may be good to worry about things but sometimes we have to remind ourselves if we are thinking about this correctly. Good luck w/ev'thing.