Hangover without drinking!

Okay so I used to feel hungover with major anxiety the day after drinking but I'm 18 weeks pregnant (obviously sober) and a couple of days ago started to feel "hungover" (like shit) with major anxiety. When this used to happen I would blame it on alcohol but now that I'm completely sober I'm wondering why I feel like this! Help please !!! Maybe too much sugar? Maybe dehydrated?