Hi canmark,
I’m sorry to hear about your experience and it appears that for some reason you may be sensitive to a material that would normally be fine for most people. I have also had a similar experience with a specific memory foam topper (see here) although I haven’t had any reaction to any other type of memory foam.
The foam in your mattress is made by a North American foam manufacturer that is CertiPUR certified so for most people it would be “safe enough” but unfortunately there are a small minority of people who may be sensitive to some types or variations of memory foam that would be fine for the majority. There is more about this in post #6 here from earlier today. Outside of avoiding memory foam completely it’s not really possible to avoid some risk of having a similar reaction with another type of memory foam that used a different formulation because your own personal experience may be the only way to know if you are sensitive to foams that are certified for harmful substances and VOC’s.
There are also some suggestions in post #3 here that may be helpful to reduce the smell or the amount of offgassing but it’s possible that you are sensitive to memory foam in general or possibly to a specific formulation of memory foam made by a specific company or even to a specific batch of memory foam that was somehow different enough in how it was made or cured that it triggered a reaction in you.
This would be a question that would depend on the sensitivity of the person because a minority of people that are more sensitive or that have certain health conditions such as MCS (Multiple Chemical Sensitivities) may be sensitive to a specific type of material that most other people would be fine with. There is more information about “safe” materials in post #2 here that can help answer the question “how safe is safe enough for me?” but by most people’s standards a CertiPUR certified foam material would be “safe enough”.
For most people they would be fine after they have aired out for a few days or at most a few weeks. A small minority though may still be sensitive and would probably do best to avoid either the same type of memory foam or in some cases where they find they are sensitive to other types of memory foam as well it may be a good idea to avoid memory foam completely.
That would depend on the return policy of the store you purchased from and on whether you talk with someone that can make an exception if you are outside of their normal time frame for a return or exchange. Even if you are outside of the time frame … I would certainly talk to them about your situation and ask them to make an exception. You may need to go up the chain of command a bit to talk to someone that has the authority to help you to have a better chance of success. While they may not be “required” to make an exception … they may decide that an exception would be reasonable given your circumstances and for the sake of keeping a customer happy that will share their experience with others which in turn can lead to more sales than unhappy customers that share their more negative experiences. While your situation is about a different set of circumstances … post #22 here would also be worth reading and I would take a similar approach with the issues you have when you talk with Sleep Country.
There is more information about the relative “safety” of different types of mattress materials in post #2 here that you can use to help you decide which materials you are most comfortable having in a mattress and that are inside your “risk tolerance”. If you have slept on other types of memory foam mattresses without any reaction your “symptoms” may be specific to this type of memory foam and not to others so you may be “safe enough” with a different memory foam mattress but if you have experienced a similar reaction on other types of memory foam as well then it may be a good idea to avoid memory foam completely.
If you end up needing to replace your mattress and buy a new one, and if you do decide to purchase another memory foam mattress, it would certainly be a good idea to make sure you have a long enough return or exchange policy to be reasonably certain that another memory foam mattress won’t cause the same issues as you are having now.
Phoenix