Thank you for the answers. Yes, Magus, I had seen a doctor and taken a blood test but all they identified was slight insufficiency of Vitamin D... which I take vitamin pills for every day, but things still remain.
I've never smoked, or drunk alcohol, and I'm just a kid of 19 so it's not old age symptoms either haha. I eat salads along my dinner and for breakfast/lunch I simply eat bread with chocolate sprinkles or ham, so nothing truly unhealthy like junk food or extra hotdogs between meals (those give me huge stomach aches anyway).
I do try to drink at least 5 glasses of water a day (drank 9 or 10 two days ago, felt like too much actually). So overall, I'd say I'm healthy in this regard so I hypothesized that the issue might be spiritual. The PDF (thank you Taol) says the culprit is rarely a stranger, but the only people I talk to physically are my mother and brother, and there's no negative relation between us.
Would the exercise still be possible even if one doesn't know who it is they're detaching from? Like simply cutting the cords from myself but not visualizing the other end?