Here is how things go, I have not had a period in three and half months and I have taken two pregnancy test a month and then had a blood test done and all of them came out negative. Me and my spouse have been having unprotected sex for about 5months now and can not get pregnant but I was wondering why I haven't had a period and starting to have lower back pains and just been sick for like a month but I do not know what to do.

I think you should go to your gyno there are way to many things that could be wrong. From endometriosis to your hormones just being off.And if your trying to get pregnant your doctor can help you with things to do. There is a book out also that talks about getting pregnant I think the name is Failure to Conceive. I'm not real sure of the name of the book, but that is close. It took us 10 years to conceive! We have 1 son now 21. We tried for more with no luck, so don't hesitate. GOOD LUCK!