“Unexplained bruising, cough, etc”

Unexplained bruising for over a yr. At one point bruise would come and go. 4 weeks ago one huge bruise followed by many new smaller ones. Every day. Few random bruises on arms and lower on the leg. No allergies, not taking medications. Recently often weak, dizzy, muscle weakness and pains in legs and arms. Also coughing for 3 days. No cold, no fever, not feeling sick. Just a cough. Started with a cough with no pain, not coming from deep inside but more like forced fake cough. Slowly getting worse. Sounding more like a real cough but no pain. At this point cough from deep inside with pain. Also after coughing small pain/poking pain in chest, under left breast. Also for maybe even half a year i have a small pink lump on right breast. Hard, not moving, not painful. The doctor did a regular blood test and some special blood tests. I dont know what blood tests however. All i know is that the blood test came back okay and he says no vitamins missing. He sent to hematologist but the appointment in a month from now. What could be wrong?