I wouldn't test until I knew for certain I was late, I find AF is slightly less heart-breaking than a BFN so I know where you're coming from there.
And don't worry about getting no symptoms, loads of people get none and then get their BFP, and in fact loads of other people get tons of symptoms but then get their AF lol! So you never can tell!
I have everything crossed for you, poppet!!!
Good Luck! xxx