Hello Dear thanks for your question,on health care magic,,first of all ,let me clear you Doctors time is not wasted by examining patients ,we are meant for patient ,whether on health care magic on in our consultation chambers,our aim is serve the ailing community and to relive their suffering ,coming back to your question,,light hotheadedness ,fast heart rate and feeling warmth all these are normal things in pregnancy as ,pregnancy is hyper dynamic states which means all your circulatory parameters are increased by many fold,however there is no harm in consulting a Doctor to rule out any pathological cause of the symptoms ,as for examples sever anemia can produce these symptoms ,so go and see your doctor