Ovulation after early miscarriage

Laura • ❤️Raising Warriors❤️ LJFG 31/07/13 ❤️ IKG 11/01/2019 ❤️ Rainbow baby 🌈👶🏼

I just had a chemical pregnancy/early miscarriage on 2nd Jan at 5 weeks pregnant. I only bled for 3 days. Today is the first day I haven’t bled so I decided to start testing for O so we don’t miss it. This looks positive or nearly positive to me. How is that possible so soon? I know opks can detect HCG but all pregnancy tests are now negative