Maybe because there was a speaker scheduled, there was less opportunity to get to know people. Maybe try another meeting that is not so structured.
I also would probably be feeling the way you are right now. I really have to put myself out there and I'm not too comfortable with that in new situations.
But weigh your discomfort against what you hope to get with the guild. If you want what a guild can offer, give it another try. Or maybe there's another guild local to you.
After I saw someone post about going to a guild meeting (maybe you?) I googled guilds in my state. I was pleasantly surprised to find a good choice within a 1/2 hour drive, allowing for a match of personality to guild.
Here's the link for CA.
http://www.quiltguilds.com/california.htm