How to graciously say NO to advice/comments?

Ashleigh
Hello ladies! I am a new mom, only 14 weeks and 5 days so of course I have a lot of questions and concerns. I love that there are resources where I can get some solid information. 
HOWEVER, how do you ladies respond or deal with comments and advice that cross the "line" so to speak and that are genuinely annoying and judge mental? I want advice as much as any new mom, but these comments give me new mom stress to the core! Please help me think of ways to politely shut down the nosy people!