Confuessed

This is my firs miscarriage and really don't know much of the situation of whas going on with my body all I know I took a test it came out positive june 24 was my lmp july 28 I was spotting. By aug 1 I had a heavey flow not much pain the flow lasted 4 days by aug the 5 I took another test it came out negative so I'm like wat the hell I was pregnant now I'm not its the last day of aug no period yet then I'm sceared to take another test cause I'm like mayb I'm pregnant again could this happen when is to long waiting for ur period to long and do I count the first day I bleed as my first period