Help!! Braxton Hicks or the real thing?!

I'm 24+6 with twins, this morning I woke up and had a bit of pain in my right hip/groin which I put down to round ligament pain. After getting up and putting the washing out and tidying, my bump became extremely tight all over and I struggled to stand up straight. It was the strangest thing I've ever felt! I got in the shower, and this happened again twice more. I have a bit of pain on th right side of my back now also. Does this just sound like Braxton Hicks or do you think I need to see someone?