I Took Out My Hair Braids, And Now It Is Thinning

Hi doctor,
I am a 24 year old black man with no real history of baldness in my family, For the past year I have watched my hair shed every since I took the braids I had in my hair for 2 years, I have been going to see a doctor about this for the past year and in doing so they’ve checked my blood and have not found anything abonormal but I am really worried. I work fulltime, I also go to collage fulltime, getting ready to have a baby and get married, I also eat lots of fast foods. my hair never did anything like this pior to me growing braids, can you help me by giving me so advice on how to prevent my hair from continuing to shed and give me an Idea as to what may be causeing this. Thnks and hope to here from you soon

There may be two different things going on here:

1. Putting your hair in braids for 2 years may have caused traction alopecia if they were tight.
2. You may have a component of male pattern hair loss (even without a family history).

Or you may have a combination of both 1 and 2.