Hi,
Welcome to the ehealthforum and I am glad to help you out. Your concern is regarding the easy bruisability that you are having. Anemia and deficiency of vitamins C, K, B12, or folic acid are the common causes of easy bruisability. Try taking iron tablets and multivitamins for some days and see if the symptoms improve.
But considering your history apart from these supplements, it is important to get an oncologist's evaluation and a bone marrow biopsy done to rule out any leukemia.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.