Hi welcome to healthcaremagic
Since you had an episode of attack of chicken pox
, there will be congestion of the throat, and also lungs, hence it will induce vomiting
, while coughing violently it can lead to rupture of small capillaries in the throat which has resulted in the mild bleeding... Nothing to worry... you need to improve your nutrition and immunity... the bleeding will stop, when the congestion and inflammation settles down... Hope I have answered your question...