Positive or negative

has any ladies have had or had a similar situation as mine? so I missed my period about a week on August 10 and I am nine days late I haven’t really had any symptoms other than fatigue and cravings and frequent urination I tested positive on the 11th and then now I am testing negative I haven’t had my period out or any bleeding or any cramping and I’m still showing a little bit of symptoms has anybody know what this is I’ve been looking up chemical pregnancy and I recently had a miscarriage back in February.