When I was in your shoes, I would stay home from things like an amusement park. Your husband is capable of taking the kids by himself. Then maybe later you would be able to make some simple sandwiches for dinner and snuggle in with your kids for a movie or something quiet. When I was depressed I parented a lot from the couch or bed. I made sure to talk as much as I could to the kids each day. I hugged and kissed them and looked at all their schoolwork. I helped with homework. I didn't go anywhere I didn't feel I could do. I missed some things in their lives but my husband was there. I did the best I could do. My kids are grown now and they don't seem much worse for wear from my illness. Take it easy on yourself.