I'm 10 weeks pregnant with twins - can round ligament pain start this early on?

2 days ago I had a day of on-off painful twinges in my right-hand side groin area. Reeeally painful! Then yesterday I had a similar but constant pain which lasted 5 minutes and made me lie down it was so bad. Is it too early for round ligament pain? It's definitely not cramping pain, more like something ripping in my right hand lower abdomen...