dear sir,
we got married on 8th December 2013. after that we had sex several times without protection but each time I took out just before ejaculation and ejaculated outside only. I took care of this. I found traces of precum when I was having sex on 18th December. My wife had her periods on 1st October 2013, after that on 25th October, 2013 and after that on 21st November, 2013. from this, we are clear that her cycle is of 25 days from the 1st day of her periods. As per the last date i.e. 21st November, 2013 her next date should be 15th December or 16th or 17th. Today is 21st December but till now she has not get her periods. We are newly married and are not mentally prepared for a child. We did a mistake by not using protection. We are really worried. we had a urine sample test for pregnancy on 19th December, it was negative. we also read on internet that the is negative at the early stages. We are really worried. Please suggest us something so that we can avoid pregnancy at early stages only.