So I used to smoke, and the last time I smoked it felt like my left lung was being squeezed like you squeeze a water balloon. I haven't smoked since, but two weeks later my left temple feels tight, like someone is pressing their finger on it. These two issues could be unrelated, I figure I would just throw it out there just in case. The tightness comes and goes. When I chew it intensifies. I read similar threads, and some say the may clench their teeth when they sleep which is a HUGE possibility, because I just woke up from a nap and it is pretty bad right now. No pain, but pressure. I have never had a headache in my life, and the hypochondriac in me is telling me it is a tumor and I have a week left. I'm neurotic. What do you guys think? Thanks!