I am a 25 year old mother of a beautiful son who is 4. Right after we had him, at the spur of the moment decided he was the only one we wanted so my husband and I decided to have a vasectomy. Well, I am now going on 3 weeks late which has never happen except when I was pregnant with my son. I took 4 test that ALL came up invalid, and yes, I know how to take the test and they were all different brands and it was not out of date. I am having off and on headaches, frequent urination, extremly tired. I guess you can say, I am kind-of hoping now even though I know the chances are still slim. I have not been on any meds., stressed, sick, etc. either. I guess my question is, has anyone ever turned up pregnant after their husband had a vasectomy or know of anyone? If I don't start come this coming up friday, I am going for blood work. All advice is greatly appreciated!