When can I check

Anonymous • PCOS

So ladies I thought I was pregnant from last month I wasn’t..... anyways I had sex this month the 15th and 16th and pretty sure I ovulated Saturday night which was 16th thro Sunday night the 17th....if I did when can I take a test to check? Haven’t had a period since off depo but I know I ovulated. My last three pregnancies ended with miscarriage so holding on to hope .