Hi I have gone through your complaints. some weakness will be there because of morning sickness.breath out just walking upstairs and hearing one pulse in ear needs consideration and indicate possibility of anxiety and anemia.its quite common to have anxiety in first pregnancy. with time everything will go off. if you are not anxious nature its important to check your hemoglobin level. take nutritious diet and adequate rest.any way you have started your vitamins.start iron and calcium also as there is more requirement during pregnancy. take care. Thank you Regards Dr vasundhara