Viral fever and cough. Feedbacks.

My son is 20 months old and weight is 11.2kg. He has been suffering from cold, cough and repeated viral fever from last few weeks. Initially dr prescribed Azithral 100, chericof, montair lc kidz and crocin/meftal p, nebulization with levolin 0.6 and budecer 0.5 by seeing his symptoms. His fever started decreasing with cough too. But suddenly on 5th day his cough got worst and not stopping with anything. We tried honey, ginger, tulsi everything. So dr. Prescribed chericof ls and omnicortal forte alongwith nebulization with levolin and budecort. These combinations helped at day time to reduce the cough upto some extent but at night nothing is working. It is been only 1 day we have given these medications but the cough is really bad and the child is suffering a lot. So looking for some second opinion. Please help or provide your valuable feedbacks. Thanks in advance