mic wont record

I've been trying to figure out for the past day why obs wont record my mic when I try to record videos.. obs clearly is picking up my mics audio. When I record a 30sec clip, it records my mic and I can hear it after I remux the mkv file, but when I record long videos like 10 to 15 minutes, it...

So I just bought my first real mic (yeti nano) and was going to use to record vids. But when I did a test recording, it picked nothing up. Curiously though the audio mixer was pulsing in red as if it was recording sound. Also I was able to record my voice with my headset mic before I got the new...