What is happening?

Guys, my last day of period was at 29th May (usual amount and length, 6days). I was late by appr. 6 days, already thinking I was pregnant (there were minor signs - constant bloating, mild morning

sickness). Then 'all of a sudden', on 5th July I started bleeding (it's still happening), but this is not an ordinary menstruation, the amount is way less and it is darker brownish now, on the 3rd day.

I have an appointment on the 17th but too anxious to wait.

Thanks in advance.