I had sex in June this year and got my period on the 1st of July, it was 2 days early! I was expecting the next around the 28th August but I missed it! I took a urine test today and it was negative! Could I be pregnant?

Pregnancy is still a possibility, however, since you did get a period in July, the possibility is slim. You will have to wait to see if you get a period in August.