Dehydration? Sign?

I have felt so dehydrated the past week, and peeing a ton...waking me up in the middle of the night.
I had IUI last week, trigger shot HCG 10 days ago, but didn't release my eggs at least that's what the ultrasound said, I ovulated for 5 days it felt like, could've released but who knows. 
Any suggestions? Could I be pregnant?