First, if you're using the Default sources in OBS, change them to the specific device(s) that you want to use, and Disable or Remove the ones that you don't. Default defers that choice to the operating system, which can and will change it on you without warning or indication...except that OBS is now looking at a different device, without you having done anything. As you might imagine, that breaks almost everyone's rig at some point or another.
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It could be that that solves the problem entirely, but if not, look at what options you actually have to choose a device, and make sure the one you want is available. And after choosing it, make sure that it responds strongly to tapping or rubbing the windscreen, with no filters in OBS at all. Use the mic's own gain control to set that level, *not* OBS's Gain filter.
*Then*, you can think about putting some filters on, but only when you understand what each one does that you're adding and why you're adding it. The common ones are Noise Suppression, EQ, Compression, and Limiting, usually in that order, but just as they can help, they can also hurt if you don't know how to use them.
Also, look at the output settings in the Advanced Audio Properties, and uncheck the "Active Only" box in the bottom left so you don't miss anything.
"Monitor and Output" sends that source to both the Monitor (headphones, speakers) directly, and the Output (stream, recording) via the Tracks that are also right there. The other two options turn one or the other of those destinations off for that source, and they're labelled weird.
Then in Settings -> Output, you can select which Track(s) to stream and/or record.
It's important to note that these Tracks don't mix, so if you want to hear everything at the same time, you need to put it all on the same Track. Usually, that's Track 1, because almost every player defaults to playing Track 1. The other Tracks are often used to keep things separate to edit later, or for a "minus one" mix for karaoke or something like that, or for alternative languages or descriptive audio for more commercial stuff.
