I Have Had A Tumor That Was Gleoblastoma. Discovered Mid

I have had a tumor that was Gleoblastoma. Discovered mid July and removed a week later. 6 weeks of radiation and 4-5 weeks of Chemo. Now that I am going to start Chemo again my white cell count has dropped and we are unsure why. I am worried because of the troubles we had getting me on radiation because of hospital trips due to illness for 3 weeks in 4 day increments. I am pretty sure it is stress related because I seem to stay tense and worried. I get angry easily as well.