Hemmroids or baby??

I'm 33 weeks exactly.
I've never had hemmroids, and I'm not sure if it's that or just baby! 
My daughter sits super low.
I'm experiencing A LOT of pressure on my butt! 
**possible tmi** it feels like I'm really really really constipated almost! Or like I've bruised my tailbone
When I'm laying down, not moving its okay, but the moment I move, sit up or walk it kills and is super uncomfortable. 
I'm a little constipated, but still able to use the bathroom. Not backed up currently.
Anyone know which it might be??