If she gets really stuffed up & it's affecting her feeding, you can get a spray & a sucker to clear her nose. We used the Little Fess one, you can get it from the chemist.
Also try elevating her bed, if she's in a cot - we used a pillow under the mattress - and a vapouriser can help if she's wheezy.
Oh and you can get baby vicks too, although TBH I don't know if that does much