I haven't had that feeling in a long, LONG time. There have only been a few things that made me feel that way.
1. Dark morning before planes hit the world trade centers on Sept. 11th. I'll never forget looking out the classroom window, at 7:30 am est, and seeing those dark clouds towards the west. You just feel something bad is going to happen, deep down in your gut.
2. My dog had to be put to sleep on Xmas eve. When the vet told me that Chance more than likely had cancer, I was heart broken and felt my blood run cold.
3. Woke up with a panic attack. My heart was racing at close to 150bpm, maybe 160bpm, and it refused to calm down for nearly 5hrs. Thankfully my cardiologist said everything looked good on the EKG.