Trouble TTC

This is month 5 of TTC. I've been charting now for 4 months and OPKs for 3 months. The past three months my cycles have been 25, 30, and this month is the spotting I've had today is any indication of AF, 27.  The problem is my luteral phase. Last month it was only 9 days and this month maybe only 8 or 9. We've been having sex before, durning, and after ovulation for three months and still nothing. My Dr. said they don't become concerned till it's been a full 12 months, but if there's a reason things aren't working I don't wanna wait that long. Anyone else experience this and still have success?!?