Horrible cramping in the middle of the night.

Tiffani
I just found out that I am about 4-5 weeks pregnant! Yay! Last night, I woke up because I has terrible cramping and when I got up to use the restroom, I felt dizzy and light headed. Took two tylenols and slept it off. Then I woke up again due to painful cramping. No bleeding, thank god. Is this normal?