It just confuses me! Which one is right?
There's no single right answer. It depends on what your mind is expecting. For example, a few years back I had a strained calf due to a flat foot and thought it was ALS (because my dad had it). I couldn't sleep at night with my heart racing in a resting state up to 160 BPM. Fear would overcome me and I couldn't think about the future. Like I was trapped in a room. But it passed with time when I simply gave up worrying and I eventually found out that it was a flat foot. A few months ago I had some heart palpitations after an intense excercise with low energy because I had last eaten hours ago. I thought my heart is failing (even though there wasn't ever a sign that I had heart disease) so my symptoms were high blood pressure, high heart rate, dizzyness and a "feeling of dissapearing". Because that's how my mind imagined dying was like.
Because, you see, when you have ALS, you live for another few years. When your heart is failing, you die within minutes. The symptoms of my panic attack corresponded with the expectations imposed by my mind. But don't be fooled, it wasn't my conscious mind. So your weight loss (or gain) is most likely a result of anxiety. Perhaps you subconsciously worry about something and forget to eat, perhaps your bowel evacuates shortly after a meal so you don't get the nutrients from the food, or whatever. This worry isn't always obvious to you and therefore you shouldn't worry yourself with thoughts like "what if". I went to an orthopedist about that flat foot and told her that I had thought it was ALS. She chuckled and said that "it's ok to blow on your skin even though you don't have a burn" but why immediately jump to the worst conclusion when there is a bunch of things between the starting point and the worst thing. (this blowing on your skin is a free translation of a saying in my country, didn't know what could be an english equivalent
You should think more positively. Get yourself a mantra and repeat it in your head. I like the quote from the movie Dune - "Fear is the mind killer. I shall not be afraid." You'll convince your brain to change its mind. Because that's how the brain works, it's called neuroplasticity. In general - when you think about something, neurons create certain connections. When you think about it A LOT, these connections become stronger. When you don't think about something at all, the connections get weaker and eventually dissapear. That's how you forget stuff. This is science, not some spirtual hokey-pokey.