22 weeks - stomach cramps only at night?

Hello lovelies!

Was wondering if any of you feel stomach cramps at night and if this is normal? Had them for several weeks now (once a night, I have an episode of several cramps). My doc said it’s normal and that should up my magnesium intake. Just wanted to understand if this is common at all and run by the group. Also have muscle spasms in my calves nightly. :/

Thanks!