Hair dying whilst on abemaciclib

Hi everyone, I have just cancelled a longed for appointment to have my hair dyed . I had a patch test for L’Oréal ammonia free dye but over the weekend I experienced quite a lot of shedding and my hair feels much less full today . Pretty much all over - I thankfully have super thick hair so I still have a full covering . My head has been aching off and on for a few weeks and I think this was pre shedding as it feels much better today apart from one little area. Has anyone gone ahead and dyed their hair whilst taking abemaciclib and Letrozole? I would love to hear your stories - I am fully white / silver and keen to be brown again