Best time to test?

Emma • Rest in peace to my two angels.❤️ Expecting my rainbow baby. Single mum.😊
I miscarried at the end of July and had a d&c. My partner and I decided to try again straight away and not wait for my next period. It's been four weeks already and still no sign of a period. How do I know when to try for a test? I got told I should get my period between 4-6 weeks but we have been trying since I stopped bleeding after the 2 weeks. Do I wait another two weeks? I'm so confused on when to take another test! Please don't say that I should have waited for my first period, this is what we decided and we were happy about the decision, all I need is help and advice thank you xx