Hi anabelian,
You’re very welcome.
Many stores that feature “latex mattresses” are in fact mattresses containing just a few inches of latex, using other materials for the remainder of the mattress. Make sure you are provided the complete specifications of anything you sample.
There will be a break in and adjustment period for any new mattress or sleeping system (not just latex) as the mattress loses any of its “false firmness” and the cover stretches and loosens a little and your body gets used to a sleeping surface that is different from what it is used to (see post #3 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.
Happy testing!
Phoenix