hair loss/alopecia

Hi everyone,

I'm new to this site and wanted to buy a remedy but decided to post first so that I can get a good idea of what to buy.
Here is my problem: I black(25%mixed) and used to have a lot of hair, very thick. My hair grows very fast. In 2005 I started loosing my hair very fast and during the same period my nails started becoming very brittle, still are. My nails used to be very long and hard. Now they are very short.
I used to wear weaves and every time I had this pain on my scalp. I came to think that my scalp is just too sensitive. The pain was mainly on the sides just above the ears. And those places have spot of hair lost.
The back of my hair is still thick but I can see the hair loss moving toward the back. The centre and the top of my hair have only 50% of the hair. My scalp is very painful.
I want to say that I started loosing the hair when I had a trauma and stress.
Last year I was told by my doctor that I have iron deficiency and since then I've been taking iron. and last month I was told that I have very low VitaminD and that my iron storage was low. I'm now taking iron and Adcal-D3.
I tried all sort of shampoo out there, I'm now using aphogee and shampoo my hair once a week. But each time I scalp is very itchy the following days afetr the shampoo.
Strangely enough my scalp, mainly the front always has dry skin coming off.

When my hair was full and normal I used to have lots of dandrufts but now there is none. I stop weaving my hair 5 months ago now but each time I was my hair and blow dry it my hair fall, full lenght hair. This week I've started massaging my scalp with Cartor Oil and wash my hair the next day.

There is my story, my wedding is on the 12th of February next year and my hope and dream is to have enough hair to style it.
PLEASE HELP AND SO DESPERATE