I am 42 yrs old and my husband and I have trying to get pregnant for years--have some fibroids & endometrisis. I have always had a regular that is either a 25-28 cycle days. I have never ever missed a cycle until now and have had high Body base temperature for almost a month now--now for the first time ever my period is 3weeks late. I am having a lot of early preggo signs such as slightly lower back pain, frequent urination, bloated, breast seem bigger and fuller than normal, very sleepy at certain time of day. I am 3 weeks late and taken home pregnancy test today and still came back negative . could I still be pregnant....and if not what could be the cause of this?. thanks