Is It Leukimia, Lymphoma Or A Blood Disorder Of Some

Is it leukimia, lymphoma or a blood disorder of some sort? It all started April 9 I started feeling off but figured I was just run down from work and I needed rest. My family and I went to Minneapolis that night and the next morning April 11 I was really sick to my stomach ate a little but not much. We went to Mall of America and walking around I started feeling weak like I could pass out so I sat down for 45 minutes while my family shopped. They came back at lunch time I attempted to eat and I couldn't it made me sick and it all came back up so my husband took me to the motel so I could sleep. I slept the whole time they were gone which was around 4-5 hrs. That night at supper my husband tried to get me to eat and I said no I feel sick and I went back to sleep. The next day was Disney on ice that we were taking our girls too I was determined not to miss it so I stuck it out. We met my mom at the mall again afterwards and I attempted to eat a salad ate a little got really weak and sick so told my husband I was going to sit in the van. I ended up throwing up and sleeping for those 2 hrs. On the way home I wouldn't eat supper and my mom and husband convinced me to go to ER so I did, they drew blood and 5-10 minutes after it was drawn the doctor was back saying your bloodwork was flagged your hemoglobin is 8.5. Over night with iv fluids dropped to 7.3. They did a scope and it was clear and a colonoscopy and it was clear. He discharged me on Tuesday and it was 7.5 and told me to take iron pills 3 times a day. I had a appointment that following friday and it was up to 8.5 again so he felt confident it was rising. I was still feeling weak and sick so I went back to doctor Wednesday and it was up to 10.5. He is referring me to a digestive disease doctor and doing a ultrasound to look at my gallbladder. He gave me iron and hospital and it didn't really touch it. What could be wrong? Thank you.