Baby using right side mostly


Hi ladies, I'm a little concerned. My almost 7 months old is using his right hand and legs more than his left. Generally when he is upset or crying, he moves only his right leg and hands. However, when he is playful he will use wave both legs. Even when he is crawling he will drag on his right side, and his left will be pulled behind. I'm a little concerned. I won't be meeting his doctor for a while. Just wanted to ask on here if this is normal or no.