HIGHLY recommend the Owlet smart sock thing
Got one for my newborn after my wife's aunt had an issue with her 2mo and honestly it gives us peace of mind. Real-time notifications, heart rate, oxygen levels. Yeah it costs like $300 but we sleep better. Some people think it's overkill but for first-time parents? We love it. We're in Chicago and they sell them at Buy Buy Baby but you can also order online.
How much were you out for one? We've been looking at it but my wife thinks it's overkill for a healthy newborn. Would love to know if you think it's worth the investment price wise.
The Owlet saved my sanity when our daughter had that one night where her O2 dropped. Got alerted and were able to move her position and everything turned out fine. Some people think it's unnecessary but honestly after that I don't care what they think.