Welcome to Healthcare Magic hCG diet is similar to thyroid hormones. It can cause high blood pressure and heart arrhythmias which can explain chest pain. Get to a Doctor and get examined for blood pressure and ECG to rule out heart problem. It would be best to avoid this as there are many side effects which will ruin your health. To lose weight you need to avoid junk food. Eat plenty of fresh fruits and green leafy vegetables. Drink plenty of water. Stay stress free. Do regular exercise. If recent increase in weight you can check thyroid hormones also.