@gigiraj A neurologist will tell you what specialists they think you should see and order tests. They will probably check your thyroid function, because if it is too high, it causes heart palpitations ( so can asthma and breathing issues), and too low thyroid function causes constipation and fatigue and weight gain. Tingling can be aggravated nerves and/or circulation issues. I have thoracic out syndrome which would be an example of that due to compression of nerves and blood vessels in my shoulder. If dietary changes and drinking adequate water don't help the constipation, it could be thyroid related. That would be a good place to start.