Hey Madeline,
My most common/ enduring symptoms have been lethargy, GI issues (constipation or diarrhea depending on the day), and swelling of my lymph nodes. You can almost always feel the lymph nodes protruding in my neck. I also experience joint stiffness and notices changes in my skin that I would assume fluctuate based on my hormones.
One common symptom I haven’t experienced is changes with my weight. I know it’s really common to gain weight with a hypoactive thyroid, and to lose weight with a hyperactive thyroid.