If you have really consistent severe anxiety, along with symptoms such as feeling cold or hot all the time, unexplained weight gain or weight loss, feeling super agitated or fatigued, fast or slow heartrate, feeling like your eyes are either sunken or somewhat bulging more than before, dryer skin, diarrhea or constipation, aches and pains, a sense that things seem darker or brighter, insomnia etc., get your thyroid levels checked. Don't just get the TSH checked, get a full panel done along with antibodies after talking to your doc. 

There are common autoimmune conditions that can cause extreme levels of anxiety and jitters as well as fatigue. Hashimoto's for example occurs in approx 12-14 million americans and can cause fluctuations between hypo and hyperthyroidism. Graves disease causes the body to produce way too much thyroid hormone, ramping up the speed of everything, making your eyes somewhat swell, you may run hot often, feel aggitated and anxious consistently, and so on and so forth.

Thyroid conditions are incredibly common affecting possibly over 10% of the population, and reminder: it affects both men and women. So def get it checked if you align with anything here.