First, I hope you recover from this illness ASAP and feel better ASAP! Being that ill is sheer misery.

Second, the first thought that came to mind is that you posted about your husband's and cat's sickness directly, but only indirectly referenced your own illness in the second post since it was about your husband taking such good care of you. The first post, being focused only on their poor health, naturally evokes hearts, comments, etc, but the second post doesn't necessarily require or prompt the same kind of reaction and action since it's a comment about your husband taking care of you. The kind of comments that would make sense in the second case, are ones saying "oh, you're so lucky" you have such a wonderful partner." And maybe your mutual friends didn't feel the need to say this.

That's another perspective for you to consider here.