Muscle Knot 5 Months, Gastric 2 Months, Less Blood 1 Months

Hello Doctor, I would like to ask I feel like there is a muscle knot in the back of my neck because when I squeeze it it does not hurt and it will produce wind or belching and I want to ask again for 2 months the wind in my body is not gone already various medications I have eating but not gone, the symptoms I experienced (frequent belching, farting, shortness of breath, blurred eyes, tired quickly, feeling lifeless, dizziness) and I feel like I lack blood in the body also doctor because before if my hands were veins I feel very healthy now the veins in my hand blink and blink and when the veins appear I feel a little healthy does that also show that the blood in my body is less doctor?