I am 24 year sold, I am mother of two boys and the elder one is 3 and half years old and the younger on is one and half years old, I had normal period in 22 august then I had a light period in 20 September then after one week I had a staining then I took a pregnancy test and it was negative and now I have a white mucus discharge, now in 21 October I haven't had my period if there any chance that I am pregnant and if yes, is there any method to avoid the pregnancy.