Usually bleed when skipping period, no bleeding this time.

Patient: Hi,Im on the pill and i usually skip my period every month but will get a small amount of watery blood for about 4 days if that, anyway last month i didnt skip my period i took my sugar pills and got a normal period, this month i skipped again but no blood at all came out, could this be because i got a proper period the previous month or because i could be pregnant… ?

Symptoms: No other symptoms of pregnancy