When should I test?

I'm just gonna get straight to the point! I had a miscarriage on September 5th and was told I would have my period 2-3 weeks after I stopped bleeding from my miscarriage! It's been a month and half since I've had any sign from AF. I usually get bad cramps and a headache! I've had nothing but breast tenderness. We didn't plan on trying again so soon but we are just way too excited. We're going with the flow and we were told that I could still get pregnant right after a miscarriage even if I didn't have my period. I'm getting kinda antsy and don't know if I should test.. should I wait it out another week? Or what. I need some advice!