When should I test

Am
With my last pregnancy, I got a BFP via blood test at 7 weeks, the same week I got my blood test I did a urine test in office and it was negative. I've had pregnancy symptoms lately and I'm not sure when I should test. I had implantation symptoms the week of August 8th and had ovulation symptoms the previous week. If I didn't show via urine test until week 7 with my last pregnancy, when should I test? I have tested today and got a negative but I didn't show until later with my last. Please help!!!!