First Yeast infection - help!

I think this is the first time I’ve had a yeast infection, and I was told i should go to my gyno for my first yeast infection. However, she’s all booked for the next 3 weeks.

So what do I do? Would it be ok for me to buy yeast infection cream or something?

Or do I just wait to get a gyno appointment?

(So far it’s just a mild discomfort / itchy feeling but I would like to get rid of it ASAP)...