Mine went on day 15. I had it cut very short (No 3 clippers) so that only tiny hairs shed from then on, much less dramatic. Losing hair is hard for most women, but my scalp felt very uncomfortable and my hair felt like it belonged to someone else for over a week before it started coming out, so it was almost a relief! I chose wigs (synthetic, light, easy to care for) but there are lots of options and lots of people can advise. Take care.