This happens
at least once every 10 minutes. Live in midwest so I'm not sure if
weather is playing a part in this. Can someone with experience chime in
here and let me know if there's reason for concern?

Might just be sunlight causing expansion. I've got a 50 year old
brick-on-block rambler that regularly pops around 10am and 2pm during summer
on sunny days. Does yours make the noises at night or on overcast days? If
not then expansion's probably the cause. As for settling, do you see any
cracks in the dryall anywhere? If you've got a long level (not just a 3
footer) you could make note of how the flooring lines up between the old and
new portions. Make note of how it's situated now and then check it over
time.