Hi girl. I've been wanting to ask you for a couple of days my pulse is…

Hi girl. I've been wanting to ask you for a couple of days my pulse is high. The highest was 147 and it's constantly 140-147. I'm going to start doing things around the house or go up two floors from the hospital and already feel bad though the pressure is normal. Could this be a sign of a heart attack? The midwife said to go see a therapist.