LP going from 12 to 18 days!? I need some help.

brideonjuly8

My chart link is in my sig.

So my LP has always been (for the most part) 12 days.  My first cycle on Femara it was 14 days, but I had read on here that some other ladies experienced longer LPs on meds also. 

I'm 16 DPO, and just now started spotting.  I usually have 2 days of spotting then I start CD1.  Is this normal to have it keep getting longer and longer?  There might also be a possibility that I Oed 2 days later than I thought I did.  WDYT?  My temps were all crazy, and I wasn't sure I could trust what the monitor said since I had a trigger shot. 

Has anyone else had this happen?