I've been feeling these twitching sensations in my chest for about 11.5 months now. It's like a really minor shock or spasm right in the center but a bit below my chest, and they last for less than a second. It used to happen less often, but in the last few days, it's been like 5 or 6 times a day, if not more. I've never felt anything like this before. I should probably mention I smoke, but not too heavily, and I've decided to quit after feeling these twitches. I used to go to the gym regularly before I quit a month ago, and I don't think I had this issue when I was lifting weights. I've also noticed that these twitches happen more if I haven't eaten or slept for a while, though that might just be a coincidence. It's stressing me out and making me really uncomfortable. Any ideas on what could be causing this or what I should do?