Hi,thanks for query.From the symptoms it seems that you are having some allergic bronchitis
.As long as there is no fever
possibility of infection is less likely.Try to find out the reason for this,as at times you can make out.For proper evaluation please visit your doctor and get some investigation done.Avoid provocative things like cold drinks,chocolates,cake,pastries,strong smell etc,take more of citrus foods which are rich in vitamin c
that will boost your immunity.Constipation
is different issue,take light diet,do regular exercise,avoid maize products,cold drinks etc.Take more fibers in your diet.
wishing you good health.