Continuing progesterone after negative pregnancy test

Had anyone ever been put on oral progesterone supplements to lengthen your luteal phase?

If so did your doctor have you continue taking the pills even after a missed cycle and negative pregnancy test?

If I am 32 days into a cycle and I’m normally 28 it has lengthened my cycle but I have negative tests. Is continuing on the progesterone just delaying my next cycle to try again?

I’ve had some light spotting but no actual bleeding.

We’ve been trying 14 months now... just don’t want to delay things any further.

Had anyone had success with a progesterone supplement and a bfp after trying this?

Any advice?