Hi. I Took A Pregnancy Test This Morning Because I

Hi. I took a pregnancy test this morning because I was feeling queasy. I am due for my period on Friday, August 24. It was an equate digital. It's one month old and I have had unprotected sex. It was also a month old. I got a positive result. This afternoon while out and about I took another from the dollar store, it read negative. I suffered from a blighted ovum last year and need to know if I should set up a doctor appt? Thank you