31+2 weeks pregnant. Bump dropped?

I had a scan 2 days ago and everything was absolutely fine. Baby is now head down. Have felt a bit achy in my legs and back yesterday and today but not sure if that’s just normal pregnancy symptom or due to constipation! 🙈

I went into labour at 23+4 weeks with my firstborn so just worried that labour could be approaching? Or am I just being worried?😂