I developed a cold sore looking bump after my kitten scratched me on my lip should i be worried?

Cat scratch..see doc: Have your doctor evaluate for Cat scratch disease- this is caused by a bacteria called Bartonella henselae resulting in swelling of the lymph nodes- more than 90% of people infected with this bacteria had contact with cats or kitten. Other consideration should be given for a coincidental infection such as with HSV (Herpes) .