This is always a difficult question to answer, especially before meeting and knowing you, and your history,  However, it is useful to know that the effect of acupuncture is cumulative which is why, a series of weekly sessions is usually the way to begin. 

If a problem has been with you a long time then it is true that the longer it will take to get well.   Sometimes though a couple of sessions is enough to help a particular problem.

Acupuncture is a fine form of preventative medicine and therefore many people opt, once well to return for maintenance treatments perhaps every month or 6 weeks, or even just 4/5 times a year at the change of the seasons.