Hi cubby,
No … this wouldn’t be part of the problem. The adjustable bed in the flat position would provide the same or better support for your mattress as a standard rigid non flexing foundation and the different positions would allow you to have additional options that aren’t available with a traditional foundation.
Latex is the most durable of all the foam materials and while it comes in a wide range of softness and can be used in thicker or thinner layers … it softens and breaks down more slowly than other types of foam materials.
The type of materials isn’t the problem or nearly as important as the design of the mattress and how well it matches your specific needs and preferences in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences). Any material can come in thicker or thinner or softer or firmer layers or in different combinations that can be used to make many different mattresses that work well for some people and don’t work at all for others. If your testing or experience indicates that their all latex mattress is a good match for you in terms of PPP then it may be worth considering. If it isn’t … then I wouldn’t consider it at all. The same would be true for any mattress you are considering.
While I’m always happy to provide as much information as I can that can help you gain some insights about what may be happening (such as the posts I linked earlier) … in the end only you can feel what you feel on a mattress or sleeping system and only you can decide what you believe needs to change. I would also keep in mind that when there are health conditions involved that there may be no perfect solution or mattress so “best possible” may be the most realistic expectation.
If I had to guess though and based on the very limited information about your “symptoms” you’ve provided (a detailed description of the symptoms and where they occur, when they happen over the course of the night, and the sleeping position that they are most likely to happen etc) I would guess that your mattress was too soft in some way (either comfort layers that are too thick/soft or support layers that are too soft) to provide good alignment for your spine and/or joints in all your sleeping positions. If this is the case … there is more about mattresses that are too soft in post #4 here but the “best” option would generally be to exchange the mattress for a firmer one (and hopefully they will be willing to make an exception to their exchange policy).
After 60 days it seems clear that the mattress you chose isn’t a good match for you in terms of PPP but even if a mattress you exchange for is too firm for you and doesn’t provide the pressure relief that most people with fibromyalgia would need … you would still have the option of adding a topper to “fine tune” the pressure relief and comfort of the mattress.
Phoenix