Anyone had a similar experience...

This is my longest cycle ever! Currently on cd41. Spotting on and off but very light (slight tinge to tissue when wipe) or pink in cm for past week, some days nothing at all. Tests say bfn, anyone else experienced this? I had a miscarrage in Jan but have been regular the 2 months past that cycle. I am still in Aprils cycle as no AF yet. I don't chart and missed my LH on opks as couldn't test. Any replys would be great as never had this before x​