pregnancy?

Could it be???

-She's thirsty - like drinking almost twice as much daily and won't go anywhere without her insulated water jug.
-Gassy (more than usual)
-Feels like she's constipated, even though she's going daily.
-heartburn/indigestion
-frequent need to urinate
-weird blood sugar (she does not have diabetes, has been tested very recently)
----If we go more than two or three hours without eating, she gets exhausted and grumpy like she hasn't eaten all day
----realizes she's hungry, starts to get dizzy (in either order)