Erin Chambers starts a recurring role on General Hospital today! The show airs at 3pm et/2pm pt.
Also, it looks like ABC posts full episodes here after they've aired.
If you miss it, you have another chance to view it there. :) She's going to be in several episodes. I don't know how many for sure, but the character is supposed to stick around for a little while at least.
Edit: You can also see only Erin's part of today's episode here.