I get this all the time. Get a bowl of steaming water and put a towel over your head and take in deep breaths (don't burn yourself though!) The steam helps to loosen all the crap in your sinuses. You can add vicks in it too but you only need a wee drop. It should pass in a few days but if it doesn't you may have to go to the docs for those antibiotics
A salt rinse is goog as well ganesh
Pour some tepid water into a basin
Add quarter teaspoon of salt, and mix
Lean over sink and scoop up the water
Sniff it up one nostril while holding the other shut
Repeat then do the other nostril
A bit messy but you can feel the sinuses unblocking.
I had really bad sinusitus it ended up with me having a op, but the miracle cure for me after years of painkillers was otravine nasal spray, it clears the sinuses i also used to use vicks nasal spray, although docs dont like them being used forever they really were a godsend for me.
this might help you at night, ganesh. I used to pour some ti-tree oil onto a couple of tissues and pin them each side of my pillow, so that which ever side I was lying on, I could inhale the fumes - sounds extreme, I know but it got me through the cold weather nights - I wish you luck [and relief]