What substrate are you keeping her on? And what was she kept on before you got her? (ie. what COLOR is the substrate?)
Some minor noisy breathing can be "normal" IF a snake's nostrils are plugged- snakes cannot "blow their noses" as we do. Also, besides substrate getting packed into their nostrils & heat pits, when BPs are kept with inadequate humidity, they may also fail to shed the outer linings of their nostrils, which will also result in some noise & difficulty breathing, as you might expect, simply because their "nose is plugged".
Good sign she's eating & not mouth-breathing, bubbling or constantly wheezing, but if you're still worried, do see a qualified & experienced herp vet, as there's only so much we can tell "from here".This site may be helpful if you aren't sure who to see: https://arav.site-ym.com/search/custom.asp?id=3661