Will I be charged for turning on my iPhone 6's wireless hotspot feature?

I have a verizon shared data plan (10 GB/ month) and I recently learned that some plans from various carriers include a charge for using a phone as a wireless hotspot. I didn't know this and would often turn it on, assuming that it would simply use some of the allotted data for the month. My phone didn't warn me in any way that there would be an extra fee. Now I'm worried that I was being charged $10-20 extra in each month I used it. I've searched for info but it can be very vague and confusing. Does Verizon charge for this feature in a shared data plan like mine?

No, Verizon doesn't charge extra, other than the data you use.