my 2 and 1/2 month old has cold for 15-20 days now, his nose gets blocked in the morning and he cries a lot, I have used solvin cod land mucolite drops but no effect, I am also using nasomist to loosen the mucus, but there is not much improvement kindly help. also, due to heat we switch on AC on 28-29 degree at night, should I stop using AC, I cover him with full clothes at night