Felt “drunk” when I woke up

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I’m 18 weeks tomorrow and when I woke up this morning I literally felt like I’ve been drinking, I felt super dizzy and off balance. It got better throughout the day and now it only happens when I bend over. I know I’m not dehydrated because I drink a ton of water. I do have dips in blood pressure once in a while but it normally doesn’t feel like this. Any ideas on what it could be?