I think I might be pregnant!!!!!!!!!??

Omg!! So last night before I took a shower I decided to take a pregnancy test "just for fun". AF is due today and I was not expecting a positive at all so I just took one of the little cheapies but to my extreme surprise there were two definite lines! I showered thinking it must not be real. Then after I told my husband and took another one with a better test. Sure enough that one was positive too! We both just started laughing with joy/excitement/a little shock. He was so sweet and even teared up a little. We couldn't believe it. But then in the middle of the night I woke up with extreme cramps. Like they've never hurt so bad. Is that normal??? I took another positive this morning but I'm a little nervous. I just hope everything is right and normal.