Advice please???

Ok I had a miscarriage in March but my periods went mostly back to normal.. Only off by a day or 2... But this month I was suppose to start on the 16... I still haven't started.. So that makes me 7 days late... Me and my husband always have unprotected sex cause we want a babe..but me being this late we don't wanna get our hopes up too soon...When should I test? Any advice at all please... Thank you!!!