Thank you for your help. I guess I have misread the amount. I am used to read GB versus MB, especially with 3 decimals. It makes more sense That I only used 86 MB.
I did turned off all of my apps that were using cellular data over a week ago, however, my account states that I have used over 84,500 MB of data in the last 3 days, and this happened after I have changed my plan (increased) from the $35 to $40 plan....