Hi, i had my last period on the 27th of july and it ended on the 2nd of august. should i be worried if i do not get one at the ending of august?

Varies: if you are used to having very regular periods I would expect it about that time. It is not unusual to have 5-7 days variation on any given cycle.

Late cycles: Any delay in a menstrual cycle should prompt a woman to consider a pregnancy test if she has been sexually active during the previous weeks. However, many things other than pregnancy can cause an alteration in menstrual patterns.