Hi jgmarans,
At your weight the firmness of the layers would typically be “in the range” that was suitable for you and it may be that you are just going through an adjustment period that is normal for any new mattress that is different from the mattress you were used to sleeping on (see post #3 here).
The foundation under your mattress or any mattress pad you are using may also make a difference and there are some suggestions in post #2 here that may also be helpful (although some of them are more about a mattress that is too firm than too soft).
I would normally tend to give a new mattress about 30 days before deciding whether it was too soft or too firm but if that isn’t possible then I would give it a minimum of a couple of weeks before deciding whether it’s a good “match” for you.
Phoenix