I believ that while it may not be possible to diagnose your condition online, your symptoms point to an illness that is affecting the blood cell lines.
This could be due to an infection (Parvovirus, HIV etc.), inflammation (collagen vascular diseases), malignancy (Lymphomas), bone marrow infiltration (myelodysplastic syndromes) etc.
I beleive that a consultation with a hematologist (blood specialist) would b euseful and essential to help in the diagnosis..
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Regards
Dr. Gupta