I meet the ewquirement of TN VISA,but I worry about the border o

I meet the requirement of TN VISA,but I worry about the border office perhaps would think that I am a lier because I said I just visit my friend and travel around the U.S.,and I don't find job here, so he gave me B2 for six months, and all are recorded in the computer, now I found a job,and I come agian to apply for TN Visa within 10 days.
So I worry about it。 I hope it is easy and no problem for me.