My GP loaned me a neb while i have a chest infection. Not sure whether to use it tonight. My peak flow is 440 but i am quite wheezy. I'm trying not to use it if i can help it, but the phloegm on my chest is making me wheeze. I have used my blue spray 3 times. The wheezing goes for a short time but then comes back. Should i use my neb? Will it suppress my wheeze?