Curious how old your kid(s) are and whether your symptoms started up after having a baby? Hypothyroid after childbirth is not uncommon - especially the auto immune stuff like Hashimoto's that may come when your immune system is in hyperdrive from childbirth, nursing, etc. That's what happened to me.

I pretty much decided I was just going to be tired and miserable forever once I had my daughter and was trying to work full time. A year later, an alert GYN noticed my large thyroid and ran tests. Within a few weeks of being on the correct dosage I was my old self again. 10 years later, all is well. I'm still on a little pill every day, but I feel SO much better!!

Good luck !