Most of my LPs were 9-11 days with lots of spotting. My BFP cycle was similar until the spotting stopped on day 12 with no AF in sight. Since this was the longest LP I had ever had I tested.
My LP varied from 7-14 days, so "late" was hard to gague. It takes just as long with a short LP as a long one for implantation and HCG to build up, so I decided to save money and not test until 14 DPO (if I even got to that point) most cycles. Our IUI cycle, I tested + on 11DPO.
Re: BFP and Short LP
Most of my LPs were 9-11 days with lots of spotting. My BFP cycle was similar until the spotting stopped on day 12 with no AF in sight. Since this was the longest LP I had ever had I tested.
Good luck!
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