If you have some of the above symptoms, plus you alternate with hypo symptoms such as
weight gain, constipation, depression, dry skin and eyes, hair loss, muscle pain, brain fog and migraine, rashes or hives, heartburn and GERD, then get the TGab and TPOab antibody tests for Hashimoto's.
Also, get an ultrasound of the thyroid.
People with thyroid disease are commonly low in B12, iron and D3 vitamins. Low D can cause terrible neck cramping and muscle spasms all over the body.