Fragile/weak hair

So my daughter is 18 months old and we also have a second on the way. My hair is still so horrifyingly weak after having my daughter, I have so much hair breakage and split ends. I have one section on the left side of my head where I can't get my hair to grow out to the same length as the rest of my hair, no matter what I do. I have even been taking hair supplements up until I found out I was pregnant again and then I had to quit taking them. But I'm seriously scared of how my hair is going to turn out after our second is here. I might be bald😩😭🤦. Any tips or hair products, natural remedies, etc that would possibly help my hair, it's be so greatly appreciated!!! I know the prenatal's are going to help some, but I'm still concerned because even when I was pregnant the first time, my hair maybe was a little better but not much. Thanks for any input!