Going to a seminar alone. Need some advice!

I signed up for this seminar/workshop and Iím quite nervous. The organizers of the event is held by a foreign businessman who made millions for his business consultant services regarding trades and investments. Heís going to be lecturing to us about how we can invest our money wisely and how we can trade efficiently that can benefit us in the long run. I booked me and my gf for the seminar but at the last min, she told me that she canít make it. I sorta have social anxiety and Iím scared to go alone. They might ask the audiences some questions and what if they choose me? Iíd probably faint if I were to speak in front of all those people impromptu. How can I calm myself down for me to push through with going?