Dear Shy,
Welcome to this forum.
I'm Kathy and I suffer from thal and sickle cell .I have thal intermedia.everynow and then the fustrations become overwhelming I had to learnt how to cope with it. I Learnt how, "to sit it out "when it happen.
I hope you make some friends to share your worries with and learn more about this disorder in order for you to live as normal as you possibly can,It is manageable.
I am glad to read that you are going to fundraising for the cause and I wish you good luck.I hope in doing so, it will help you in releasing the anger that you mentioned in your post,
Remember acceptance brings peace of mind and in returned you can achieve happiness.
I wish you the best ,regardless there is always someone here to give moral support ,you are not alone.
Kathy.