If you're experiencing heart palpitations while breastfeeding, you must see a doctor. Keep track of your symptoms, stay hydrated, eat a healthy diet, get adequate sleep, and practice stress-reduction techniques. Don't hesitate to seek medical attention if you have concerns about your symptoms.

These signs may indicate a condition known as angina which occurs when the heart muscle does not receive enough oxygen. This results in discomfort or pressure around the chest; it may also radiate down the arm, up into the neck or back. If these are the symptoms you’re experiencing, then it’s important to get medical help right away because angina could mean that there is something wrong with your heart. Treatment options for angina include medicines, and lifestyle changes such as quitting smoking, eating a healthy diet, and getting regular exercise; sometimes surgery or other procedures might be necessary too if they can help improve blood flow to the heart. 

Tightness in the chest may be associated with arm and back pain pointing to a heart disease – either angina or heart attack. Please do not hesitate and get medical attention if these symptoms persist. Please visit a cardiologist

You have an echogenic focus measuring 2.9 mm in the left ventricle - this is often a meaningless discovery that isn’t associated with symptoms. This can happen when there are tiny deposits inside the heart muscle. The heart is still by all means okay with it. Always remember to check it during the regularly scheduled visits to make certain that everything is within normal limits.

This can be indicative of various underlying medical issues, specifically when you are experiencing fainting problems. Seek immediate medical attention immediately for a proper evaluation and diagnosis.

Yes it can, if you have high stress, anxiety, insomnia, disturbed sleep patterns

Please visit a cardiologist for a proper diagnosis. Based on some tests and evaluations, the doctor will identify the cause of your symptoms and suggest a suitable treatment accordingly. Regular follow-ups with the doctor is must to monitor your condition. 

A positive Treadmill Test signifies the necessity to proceed cardiac evaluation. It would be wise to visit a cardiologist who can carry out further tests such as echocardiogram or coronary angiography in order to establish the root cause. The cardiologist will help you understand what happens next, providing customized and effective treatment for your heart health.

Please have a healthy lifestyle like eat healthy, do exercise daily, sleep well ,stop smoking and drinking if you do etc. Stay away from stress and tension to reduce your heart rates. You can also go to a cardiologist for discussing more treatments that can work for you. I hope this answer proved useful.