Hello ,            Please attach detailed report (CBC with differential ) and record body temperature every 6 hours for 48 hours. You can take (paracetamol) for body pain and drink plenty of fluids .

The information you have submitted is insufficient for a proper diagnosis. Low PCV could be due to a variety of reasons. This points to some problem that has either decreased your blood production or increased the blood destruction. Your Hb is at the lower end of normal range. It means you are at the verge of anemia. Symptoms like fever and bodyache is also very non-specific. Sometimes there's nothing much to be worried about. Simply having a  viral fever could give you the same results in hemogram. But other times there could be an underlying problem like ulcers, internal bleeding or malignancy. We need more information to arrive at a conclusion.