My lmp was Oct. 4th. On day 21 of my cycle I began to see light brown, scanty spotting. I automatically got my hopes up that it was implantation bleeding. When it didn't stop, it started to worry me. I've had very minor "twinges" in my lower abdomen on and off. I've never needed more than one panty liner for the spotting. I was due for my period Nov. 3rd or 4th. I am now 1-2 days late and on day 13 of spotting. I've had irregular cycles before but nothing like this. Within the past few days, I've been getting headaches and my breasts are tender and I'm having pains in my lower back. I want to take a HPT but I'm nervous it will be neg. b/c my hubby and I have been trying for 3 1/2 years. I have a routine appt. with my OB Nov. 12th and am supposed to be scheduling a HSG as soon as my period arrives this month. This is all just making me really nervous! Has this happened to anyone else?