Can you chcek my english writing?

I want to post something very important on social media and I dont want any mistakes, thank you in advance :

On this World Blood Cancer Day I am posting a throwback picture when I had much more hair and my eyelashes were long enough to create a shadow underneath my eyes

As I am waiting for my hair to grow back I want to send my support and love to those who are fighting a very unfair battle with #cancer because I am on the same boat with you all and I know your pain very well11 October, last year started badly: a pigeon pooped on my head and I was diagnosed with Hodgkin lymphomaI had to go back to my hometown and start chenoBut I am just one of the patients all over the worldSome of them need a bone marrow transplant, but only 25-30% of them will find a donor in their familyI want to encourage everyone who reads it to register as a potential marrow bone donor in dkmsFor this small amount of effort you can become a hero and save someone's life. You can be a cure for the cancer just as you areThe process of donating is low-painful and recovering isn't longIf you have any questions their website is very helpful