Braxton hicks!!

Ive been having Braxton hicks since I was like 23 weeks, they started of just being super tight and my belly would get HARD
But now at 32 weeks they are becoming really uncomfterable,
I lose my breath and they sorta hurt in a way. They come a lot more often now too.. 
Like about 10 times at night and I'm just wondering if this is normal? 
Should I be worried?