New zapper user-side effects

Hello,
I'm new to zapper community. I started to use terminator zapper(green) about a week ago. I feel a bit of stinging when I leave it on different parts of body except palms and soles of feet. I started with 30 min every day. I tried to go a bhit longer and experiencing tingling not just in my feet as I did before, but also in my lips. Also have a strange feeling/taste in my mouth. Overall I didn't feel quite well entire week...like I was coming down. With something(headaches, aches in different parts of my body, weakness etc.)..are those feeling normal or is this something unusual? As I said, I'm very new to this and have no idea... Tweet