I guess this is one of those 'how long is a piece of string' questions, but... how long *should* conception take if you're charting temps, using OPK's and timing BD right?

My husband and I have been trying for four months. I've got regular as clockwork cycles, though my temps seem to vary between them. AF arrives on CD31 every month, and I ovulate on CD18. I guess my LP could be a bit short - on average it's about 12 days, so to help out I've just started taking Vitamin B6.

Right now, I'm 9DPO. My temp dipped from 36.7 to 36.5 this morning (still above my coverline of 36.3, and overall my chart has been sloping down in temps since CD5 - not up!! I had bad cramps last night (8DPO) but no bleeding. I'm gutted to think that this is yet another month of no success with no reason??

Is it too late for implantation? Does anyone else have temps that go down during LP?? When should we start getting stuff checked out? I had a laproscope done in May (no problems at all) and aside from that we're both a healthy weight and exercise relatively regularly.

I've been reading this forum for a while now but this is my first post... really looking for some people to share their experiences with me before I totally pull my hair out on this TWW!!