Please have no worries. I am a doctor.

[She is nineteen years old and has pointy ears and black marks around her eyes, but. A doctor.]

If it is a curse to affect your aim, it is most likely to affect your arms. Curses are fickle- There is no such thing as a curse that cannot be broken, nor a curse that cannot be avoided with care and caution. All that needs must be done is either find the means to break your curse, else prepare yourself that your aim will not falter, no matter the conditions.