My Boyfriends Daughter Is Having Emergency Surgery To Remove Her

My boyfriends daughter is having emergency surgery to remove her spleen. she was in the hospital 4 days last week and received 4 units of blood because her H&H were critically low. She was discharged on Sunday AM (yesterday) and today very lethargic and my BF took her to the hospital and the H&H are lower than before the transfusions. she has no health issues but does smoke pot and I suspect other illegal drugs. She is in a volatile situation with her husband and I wonder if he could have beat her and damaged her spleen. I worry she isn't being totally honest to the Dr's. They were going to start her on Chemo last week but had to stabilize the H&H first. do you think this is illegal drug induced? damage to the Spleen or what is happening here?