

Short answer, no, it is not normal unless you have some kind of illness.
28 years of age is usually too young for your body to fall apart. It is enough time that your bad habits begin to show results, such as muscle loss, muscle imbalances, etc. This is usually caused by your life style. As you get older, its more important for you to do maintenance on your body and watch what you are consuming.
If your life is too stationary, then you will start to see yourself falling apart. The old saying of “If you don’t use it, you lose it” starts to hold true with time. How “aged” your body feels really depends on how active you are with it, to an extent. There are people twice your age that are in fantastic shape, that is because they put in work to maintain their bodies.
It is time to introduce some good habits to your routine. Eat a bit better, move around more, more active activities, etc. You will start to feel better again before you know it. Good luck.
Yes, its called the halo effect in psychology. Consciously or unconsciously people tend to favor those they see as more attractive and want to help them.