My doctor is starting to think I have them. I ve had blood tests done to check if anything looks out of the ordinary but everything looks fine. I ve also had a 24 hour heart monitor. But nothing showed up. I just think it s really strang because I get these attacks out of nowhere. Even if I m not feeling panicked at all. All the sudden my body just feels weak, my head hurts, and I feel like I m going to collapse. Then that s the time I start panicking because I m scared I m going to die or something. I just think it s weird that I dont feel anxiety or panicked at all when my body starts flipping out. Has anyone here been diagnosed with them? Has this ever happened to you?