Hi, I m 23 weeks pregnant and have had a very easy going pregnancy so far....apart from today, im feeling very hungover (tho I haven t drank a drop since being pregnant!) I have no energy, very heavy headed and generally feeling rubbish? I ve drank a fair amount of water, ate cereal for breakfast and a salad for lunch, I ve even been out for a short walk to to get out in the fresh air. Do you have any thoughts? Thank you for your time Chevi