Hairs falling out

I haven't shared this with anyone because I'm embarrassed and depressed about my hair coming out. The photos serve no justice, but that's a glimpse of what's going on right now. I don't know if it's due to stress, the medication that I'm on, or what. Is there any hair products that I can use that'll help my hair from breaking off?

(Before)

(Now) There was a lot more on the floor and my shirt. It was so much hair that you'd swear I had a haircut.

(Now)