I am of the theory that I have postpartum thyroiditis from weaning - I noticed the change happened right after weaning. I have some of the unique symptoms that are different from your standard hypothyroidism. I suspect I had it when my son was born too, and it did resolve after a year, like it is supposed to. So hopefully that will be the case this time. We will see when I get it checked again.
That is interesting that you all have the issue too. I suppose it is a pretty common ailment though.
You know your body best so I bet you are correct about it. I am glad you are keeping an eye on it just in case.