Normal?

Mikayla • Mommy of a beautiful angel Baylor 💔👣👼🏻 6/26/18 Expecting TWINS in June 🌈🌈

I’m

About 7 weeks pregnant with twins. I’ve been having some mild lower back cramps on and off. Second pregnancy. Is this normal? Also I’ve been feeling nauseous at night 😩 anyone else?