33 weeks and period like cramps

Michelle • Baby 💗 born 6/11/17 & 💗 born 8/27/19

This is my second baby. I should know the answer to this question....but period like cramps have been going on most of the day.. it has happened other days too but not nearly this severe. My back is killing me today... this is how labor started with my first. It’s too early for labor!! Any one else have similar symptoms??