Confused 😖

Cheyenne • Momma of two angel babies 2/1/18 👼🏻 2/3/19 & a sweet girl 12/15/19 👶🏼

So I need help. Haven’t been pregnant, chemical or otherwise, as of late. I had a miscarriage February 2018 but my cycle went back to normal right after. Until the end of July. Any ideas of why this is happening? The first time it happened I did blood tests to make sure I wasn’t pregnant, and then my period showed up before I was told to go to my OBGYN office so I had no reason to go. Now I’m not sure what to do at all.