For a couple of months I was having some issues like this about 3 years ago now. I was still using speed stacks and ephedrine regularly, but I used it nearly everyday for about 15 years so didn't think much of it. I was really stressed at work, and thought I was just experiencing anxiety from time to time. I would go to the gym sporadically, but almost every time one of two things would happen. I would feel all anxious to the point that i'd leave the gym cuz I was freaked out I couldn't harldly breath, or I would do a set and then literally feel like I was going to pass out. Being the stubborn asshole I am, I never went to the Dr.
So one day I'm sitting at work dragging ass, don't want to do nothing. I finally decide I need to get going so I take a couple sips of a speed stack. Probably had less than 1/3 of the bottle. 20 minutes or so goes by and I start feeling it a little. Another ten, and I'm like ok let's roll. I reach forward to make my first sales call and my hand is trembling, and I get light headed. I take a couple deep breaths, ok I'm fine....reach to dial again and I can't even hit the right numbers. Hand goes numb, shaking, light headed, heart starts racing.....WTF is goin on??? I stand up and everything goes black for a second and I start to fall. Luckily had one hand on the desk and slumped on it. I take some deep breaths and go outside....it's november in the midwest and i'm sitting outside in a polo t shirt huffing and puffing and sweating. Half hour goes by and I think I'm fine so I go back in. Hit the elevator button and while waiting my leg goes stiff and left shoulder feels like it's slumped down and my arm is numb. Holy fuck, I'm dying is all I thought. A co worker walked by on his way out to smoke so i went out with him and explained what happened. He stayed out there with me for an hour. I had him go back up to get my stuff and security came out wanting to call rescue. I finally convinced them that wasnt going to happen and drove my ass straight to the Dr. Found out I had high bp which i didn't know and the drink spiked me way the fuck up there. ut me on a 24 hour heart monitor test and found out I had SVT as well. Had I not finally gone things could have been way worse. I only felt like I was going to die that time