31 weeks today..need opinions

Carla • MC 30.08.18 MC 14.02.19 Rainbow baby Roman born 10/12/19 TTC 2022 Ectopic sept 14.09.23 TTC 2024

I’ve been having period like pains, some niggling back pain and hip pain with it for the last 2 days, stomach feels tense not hard as such. Baby boy still kicking and moving around. Any thoughts, should I worry?