This is a matter of grave concern. You should not take it lightly. Either you are losing blood in stool , urine or sputum , vomitinig, or you are having iron deficiency or
kidney disease. It’s absolutely important to know the cause.
Review me with following reports
1. CBC with GBP
2. Reticulocyte count
3. Iron profile
4. Urine RM
5. Stool rm occult blood
6. RFT
Next Steps
You need urgent blood transfusion.