Will I lose my hair during chemotherapy?

Hi all I'm 39 and was recently diagnosed with stage 3 IDC estrogen progesterone positive her2 negative. I've already had a masectomy and axillary lyphnode removal. I'm scheduled to start chemo as soon as Im healed up enough. They're starting me with the red devil they call it and then some other kind after that. Then radiation and 5 years of hormone medication. It feels like so much. I have long hair to my waist and have since I was a kid, I'm terrified to lose it and go bald. I'm terrified of the side effects and of all chemo brings. I'm just lost and alone. I'm so sorry we have to be here on this thread, wish everything was different for us.