Hair Help?

After I had my first son I experienced unfortunate hair loss and thinning. It is kind of back to where it was before, but without the length. Do you ladies have any really good vitamin or leave in conditioner recommendations for after i give birth? I'm planning on pumping and using a bottle as breastfeeding unfortunately made me incredibly depressed the first time around. I want to stock up before I give birth and start shortly after, so multiple brands wouldn't hurt too. I miss my long curly hair, and am stuck with thinner, short, coarse hair instead. Please help!