I have been trying for a while now to get pregnant. I miscarried back in 2008 with a molar pregnancy. Doctor wouldn't let me leave the hospital without taking some type of birth control so I took the depo shot. Since then I have been trying to conceive and I've had no luck. Now 2012 I have been following my period with the app called my days. And on April 18th 2012 it stated that I was ovulating so days before and on the 18th me and my boyfriend had sex and after the 18th. So in may I missed a period for the first time since 2008 I took 3 hpt and the all came out negative the I went to the hospital 2 times with back pain and the took pregnancy test and still negative its now 7/11/2012 and I have yet to get a period and no symptoms of pregnancy... please if you have any suggestions or this has happened to you let me know.