Should I try to get an appointment sooner?

I found out I was pregnant yesterday, I wanted to call and tell my OBGYN but I already have a well women's check up on September13th so I wasn't sure if I should wait until that appointment or if I should try to get one sooner? According to glow I'd be 5.5 weeks today. I should note that I had a partial molar pregnancy back in February and am not supposed to be pregnant again until already next year.... So this is a very scary surprise.