Braxton Hicks and Water question

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I have been having BH all day! And actually had them throughout the night the last three nights. Usually I only get them when I don't drink enough water. I have had 7 glasses (56 oz) already today. That is more than or equal to what I usually have. How much water have you drank by this time of the day? Should I be concerned about the BH? I am 33 weeks.