Lately I've been feeling like I can barely stand without feeling like I need to sit back down. Every time I stand my heart begins to race and my pulse is hard and feels fast. I feel like I'm going to fall out. I feel winded! I've told my doctor about this and she says its completely normal!! She said its called heart palpitations. This doesn't sound normal to me. I can barely function on daily tasks without feeling like I'm dying!! I'm 23 weeks pregnant.Does anyone else experience this?