Beta #2 = 321!
Almost double in about 22 hours, so perfect! I'm so relieved and thrilled and still in shock. Here is the chart I've seen some people use - based on this, there's a chance of twins, but I kind of doubt it.
Unfortunately my lunch did not agree with me today and I've spent the last few hours in bed while everyone at work is worried I've given them the flu. It could be a pregnancy symptom, but most likely it's the greasy quesadilla I had for lunch - well, I'll try to use it as a learning experience.