When to test

Hi, I had a miscarriage on July 13th. After that, I shared a bed with my boyfriend again. Since about a week later, I've been feeling nauseous, have tender breasts, feel tired, and am quite irritable. And my dog suddenly doesn't want to lie on my belly anymore, which he normally does. With my previous pregnancy, my dog also didn't want to lie on my belly. So I suspect I'm pregnant again.

I've had these symptoms for a week now, and I'm not sure when I should expect my period. When is the best time to take a test? (I have a Kruidvat store-brand test.)