My periods are very irregular and have not had one since the end of June. I have some idea that I ovulated around 15th August according to OPKs though I'm unsure how accurate they are.

We had unprotected sex on the 15th but no other day as we were unable to. I had what I believe to be implantation bleeding on the 24th and 25th of August and since have been having various symptoms. I have done a test and it has been negative. Basically I'm just wondering how long should I wait to test as I cannot rely on my periods to be an indicator.

Thank you