Misdemeanor on criminal record for concealed hand gun permit.will it stop me from getting employed?

a year ago i got a citation for NOT showing a officer my permit (i forgot) this put a misdemeanor on my recored which was thrown out no charge not guilty..im looking for a job and got the "welcome aboard!" but they need to do background check..i told them its there and that its in process of being expunged..its a collections call center job..should i worry? i asked because a retail store declined me because of it but i didnt tell them at that time because i didnt know