22.5 weeks...my hair is falling OUT!

I'm almost 23 weeks along and my hair is falling out. I mean really falling out, like in clumps. I notice it most when I shower and I'm washing my hair, I get huge bits of hair that fall out. I have always had pretty average hair, not to thick or thin, but now it's getting to the point where I am REALLY noticing my hair is starting to feel thin.

Any ideas on how to reduce it?

Help would be greatly appreciated, it is seriously breaking my heart and I feel incredibly down because of it.😢