Pro Account Credits Depleted: Urgent Help Needed for Academy Session

So, I signed up for a Pro account at $49/month for 5,000 credits. But the notetaker VERY quickly sucked up all my credits. When I looked to see if I could buy more, since I literally have 0 credits for today's academy session, it looks like the price went up already to $74.99/month. I guess the point is, I have no credits for tonight's class. What should I do? I can't afford the $200/month option.