Post TB blood in cough is quiet common. Take medicines for controlling blood. If bleeding is too much >50ml and recurrent then you need to find the source of bleeding whether the problem is in throat or old cavitary lesion or blood vessel leaking from airways.
Next Steps
Tab cough suppressive medicines inhalers and blood suppressing medicines. If frequently happening get a CT pulmonary angiogram and ENT evaluation done. That will give us some answer. Last option could be surgery or lung transplant.