I am 38 yrs old. I've had one miscarriage and I have fibroids. My last period ended on June 24th. Today is August 5th and I haven't started my period yet, I had unprotected sex July 1st and July 14th. I took a pregnancy test today and it was negative.

You didn't ask a question, but I assume you wonder if you could be pregnant.
You could be pregnant and are getting a false negative or it's a little too soon to get a positive.
You could not be pregnant and just skipped a period, or it's very late.
You could be hitting menopause or pre-menopause, when periods skip, slow down, get very light, and so on, for years sometimes.