Round ligament pain?

The last few days this pain started on the right side of lower tummy.
First it was when i was sleeping and i would turn over.
But today its been pretty much all day!
I'm a little worried - It started when i lifted the washing, hoovered. So all afternoon i stay in bed resting - But i can still feel it even lying down.
Its not all the time. Comes and goes. Its not a cramp as such. The pain is so hard to describe.
I googled lower tummy right side pain in pregnancy and it came up with this round ligament pain. Its does sound about right for what i'm feeling.
How long should it continue? At what point should i become worried if at all?

It's just one of the many joys of pregnancy! I know it's hard not to worry, but it really is just one of those things. You certainly don't need to stay in bed all day because of it - it doesn't help!

I had it really bad this pg but it went away about 20wks and has come and went, now 31wks, but never as bad! Asked my doc about it and he was unconcerned. It's so sore... feel for u. x