Hi mattressnovice,
The breakin period is normally in the range of about 30 days or so but it can take longer on occasion for some people.
There are some suggestions in post #2 here that may also be helpful (in case you haven’t read it) but I would certainly talk with them because it’s also possible that the mattress isn’t the best match for you and they may be able to make some suggestions that may be helpful as well.
Phoenix