I Use Meth Every So Often Like For Social Events

I use meth every so often like for social events that involve drinking cause alcohol makes me exhausted, and to keep myself going at work sometimes (Construction). I only sniff it, have never smoked it. A line the size and shape of a toothpick basically once or twice on a day I'll use it. I always end up with a pressure in the middle of my forehead/ middle of my eyebrows like someone's pushing their finger on it, slightly hard. It's very uncomfortable and am wondering what the cause could be. Possibly sinus irritation or dehydration? Any info would be greatly appreciated.
Thanks.