I have hereditary spherocytosis and I had my gallbladder taken out when I was 11, I am 14 right now. I weigh about 160 and It is 3:00 am in the morning right now and My spleen is enlarged, right now it is hurting, I can not jump or stand because it hurts, I just don't know what is wrong and I am scared, please help?

Summarized question: What causes enlarged spleen while having hereditary spherocytosis?