Were your periods due on 1st July, and was the bleeding and duration of the period normal, ie like your usual periods? Are you on any contraceptive pills? Missing pills can cause breakthrough bleeding. If your periods a generally regular & monthly, I would advise you to observe the bleeding pattern this month, and wait and see what happens in your next period. If you miss your next period at the expected time, please see a gynaecologist. Irregular bleeds may result from hormonal fluctuations in the body, though early pregnancy problems may also cause them.