Hi st27,
Thanks for letting us know what you ended up deciding … and congratulations on your new mattress
It’s not unusual at all to have some initial pain or discomfort with any new mattress purchase because there will be a break in and adjustment period for any new mattress or sleeping system as the mattress loses any of it’s “false firmness” and the cover stretches and loosens a little and the materials settle and your body gets used to a sleeping surface that is different from what it is used to (see post #3 here and post #2 here). This would typically be a few weeks but it can be shorter or longer depending on the specifics of the person and the mattress (higher density materials can take longer) and it can be surprising to many people how much their sleeping experience can change over the course of the first month or so.
It’s great to see that your “adjustment” to a new mattress only took a day!
I’m looking forward to any additional updates you have the chance to share about your mattress or any additional topper you may end up adding to your sleeping system.
Phoenix