Hi mommy 
Don&#8217;t worry. 
I have a weezhing baby. I know it's a trauma to see your baby struggle to breathe in n out with a rattling noise. 
But as they grow their lungs expand and thus the problem gets settled.always keep the inhalers or the nibilisers handy buy one for yourself it's affordable, so that you can avoid the on n off travel to the doctor once you have been prescribed the meds for treatment. 
Add a few drops of eucalyptus oil on your baby&#8217;s dress and the blanket she uses. 
She is just three months steaming will be risky, add few drops of lavender oil in the bath tub to help ease congestion. Once the cough in the chest breaks down they ooze out through nose n few times they vomit, it's good for them. The cough also comes out through the feaces. Don't worry. 
Lay them elevated on the bed with neck support as your baby is jus three months old. 
If required use an air purifier n humidifier. If you travel outside, always help baby wear an air pollution protecting mask.

Hope they feel better quickly. Pls do try steaming for cough. They may not be able to spit out at this age but the mucus will come out from the nose and cough it will help clear nose too. <a href="http://app.babychakra.com/article/929">Why You Must Opt For Steam For You And Your Child?</a>

For pneumonia medications are needed. Sweat is normally due to fever..you have to give them some time to recover..keep giving them medicines..for blocked nose nebulization should work

My los have got pneumonia though I have tried a lot to protect them from cold ..but still they have got .. they sweat a lot .. can that be also a reason ?? N now they are on antibiotics n nebulization .. they get cough in their mouth but they can't spit out n they get irritated with that n they also have blocked nose ..how can I help my children