I THINK I FIGURED IT OUT!!!
I've been scouring the internet and forums to see if I can find the culprit. I tried a bunch of different things and ever since I tried this last step, I haven't had to hear that stupid sound!
I went into my settings and turned off the "sync" ... (actually I pulled the menu down from the top and turned the sync off that way. I couldn't find how to di it in the actual settings - I have a Galaxy Note 5. I'll add a screen shot to show what I'm talking about). Ever since I turned off the sync I haven't heard it; it's been quite a few hours and before that I was hearing it at least 3-4 x's/hour, at a minimum.
Other things I tried but failed were: editing notifications in various apps such a yahoo mail, gmail, Facebook, etc., turning off the roaming, turning off the WiFi, turning off the NFC, turning off Bluetooth... I know it didn't have to do with roaming or the network because, unlike the screen shot from the other user, I didn't get any signs, symbols, triangles, etc when the sound chirped. Just an annoying sound with nothing else to show for it!
If I hear that dumb sound again I'll come back and update this, I'll also turn the sync back on and see if it comes back.
Either way it makes no sense because I haven't changed anything - haven't added any apps, fully charged, no change in usage, settings, etc - and it just started happening out of nowhere.I hope I fixed it!
*fingers crossed*