Hi, Michelle,
I know exactly what you are going through, because I just had my head shaved today, and I feel relieved, I didn't even cried. I had long hair, and I tried not to shave right away, I was in denial. Then, 16 days after my first chemo it started falling out pretty bad. I feel relieved now, because the feeling of losing my hair in bunches everyday was worse than shaving my head. I couldn't stand it anymore. So today I am feeling much better than yesterday(just a little cold on my head).
Try cutting your hair shorter, in order to get used to it, then shave it . Do not wait like I did, the feeling is much worse.
Hang in there. You will be ok.
Hugs and love,
Karla.