Oh chica I've had one leg (my left) swelling far more than the other the entire way through pregnancy!

I was sent for a scan to check for DVT, but only because the left leg was painful (TBH I think it was mostly the way the GP squeezed my calf that made me flinch, but better to be safe than sorry!) and all came back clear.

I think if you're concerned about it, or your leg hurts in any way you should get it checked out.

Otherwise don't stress :-) I'm so used to it now I think I'd be worried if they swelled evenly! lol