okay my hair is naturally black, I've never done anything to it like perm or bleach. So last year May, I dyed my hair black because I have gray hair(I'm young I know, it runs in the famz) then in August I dyed the back of my hair red. I want to dye my hair back to black in Feb for a formal party that's in Feb. Should I dye my hair again? the red dye I used in my hair was a Clairol product, I can't remember the exact name but it says it washes out with 28 washes and it's for people with natural hair and it has no ammonia in it.

You should be fine. The only time I've seen/heard of issues is if someone has used some type of henna product in their hair.