Pain in left arm having having food.

I get pain in my left arm after having food mostly lunch or dinner. The pain starts from the front of the tip of the shoulder and goes till the end of the arm. I also have cervical spondylosis and pinched nerve but that pain usually feels different as it flows from the lower part of the whole arm to fingers but this one goes from front part of shoulder to hand. I have a very sedentary lifestyle with only 30 min walking and resting/lying for the rest of the day. Even also at normal walking my heart rate goes to 120. I am unable to do exercise because of cervical. I went for the tmt test before i started having this pain and that time doctor said its ok. I have cholesterol around 230. In the last 5 years, my cholesterol was 400. Please advise as to what should i get checked. Regards, Rahul Sharma