Cay had this too.
Put some water in the top of an oil burner with a couple of drops of baby olbas oil, pop a candle underneath and it'll keep the water warm and the oil/vapour spreading. Do you notice she's worse at any particular time? Cay was always terrible in the early hours of the morning, so I'd set it all up before I went to bed, and then light the candle at his 2am feed so it burned through his worst time.
It definitely helped.
Raise the head-end of the cot a little, either a soft pillow under the mattress or a book under the legs of the cot at whichever end her head is (also works in Moses basket/whatever, just fold a towel or something instead so it's not so big, as a pillow won't fit). This helps the mucus drain out of the head area so they can still breath properly.
Best solution by far (and I thought it was nuts when I heard it, but it definitely works), is a drop if breast milk up each nostril before bed. So, lay bubba down, and just let a single drop drip into each nostril (one at a time).
Works wonders as the antibodies in breast milk fight off all the baddie-stuff.
If she's really snuffly, shut yourselves in the bathroom and run the shower red-hot. The steam will soften the mucus and help it drain away. Just stay in there for a few minutes, though.
These things will all help until she's old enough for medicines (mostly three months plus).
Hope it clears soon xx
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