if u shaved recently and went up it may just b razorburn no big deal
do the bumps burn or sting, do they bleed? It actually sounds like an allergic reaction to me now that your a bitolder have you been usning any new products down there?
All you need for proper female hygine is plain unperfumed soap and water , powders lotions and such can cause urinary tract infections or rashes or allergic reactions
wash with saop and water for 2 or 3 days if this doesnt clear up ask mom to take you to doctors,
one more thing cotton panties are the best as they allow some air in ,Nylon and other materials can cause problems in sensitive people