Stage 2 triple negative here, and my hair loss started in week 2 of the pre-surgery chemo (I'll also have it post-surgery). I didn't cold cap as it's just hair and there are better things (imo) to spend that amount of money on, especially given the likelihood that I'd still lose my hair (or at best have some hair but it be super patchy). I've still been working and active, but I build in lots of downtime to rest (I have not gotten this much rest since pregnancy!).