I went to see my doctor and had all of my test done and everything came back perfect but I'm still having weird pressure in my head and nausea.I am a marijuana smoker and have been for over 10 years and this is the first time that I've ever felt like this it's like having a head cold but not having a cold it's all stuffed up and there's pressure that won't go away and I also have anxiety so the weird pressure sends me into a panic attack. so I'm just trying to find out if the pressure is due to smoking or if it is due to something else that I need to see a neurologist about. The pressure only started about 72 hours ago and I've smoked very little sense because when I do smoke it seems to increase a lightheaded feeling. please help