Could this be labour starting?

[GAW19]

I'm 37 weeks tomorrow, I have Polyhydramnios (too much fluid) so have been warned how important it is to get to the hospital if my waters go.
I've felt a little bit funny today, fine, but just a little off. I started getting a bit of backache this afternoon but nothing significant. The last 40 ish mins I've started to feel really sick, my lower back will ache at the same time and I get a pain in the lower right side of bump. It keeps coming and going. Tried to bounce on my ball but it's still happening.
This is DD2 but I had a csection at 38 weeks last time so I have no idea what to expect
Thanks everyone!

Anyone?

I had too much water too, I didn’t get contractions just felt sick and back pain. I was in hospital and my midwife broke my waters (which flooded the room! But was also full of meconium ☹️) 2 seconds later the room was full of neonatal staff and consultant. within 5 minutes she was born and luckily after being suctioned she was fine. I however almost needed to go to OR to remove placenta. If you don’t feel it’s right contact your midwife unit, that’s how come I was there, but thankfully my baby hadn’t swallowed any mecomium. Best of luck hunni 💐