whoa there.. that's not panic attack, that's sleep apnoea
it's a common symptom of thyroid issues. I got it a lot until i got my meds right.. you need to write down all your issues and go back and ask for more drugs.. TSH alone is poor practice but even that shows that you could be a bit lower... my endo says I should be 0.3 to 0.9.. so "normal" is a bit of a guess and if you've already had trouble, you don't need normal you need "optimal" to feel good.
Episodes of interrupted breathing are often visible in someone with obstructive sleep apnoea (OSA) who is asleep. OSA can also cause other symptoms, often due to tiredness resulting from lack of deep sleep.
Most people with OSA snore loudly. Their breathing may be noisy and laboured, and it is often interrupted by gasping and snorting with each episode of apnoea.
If you have OSA, you may have no memory of your interrupted breathing during the night. However, when you wake up you are likely to feel as though you have not had a good night's sleep.
Other symptoms of OSA include:
•feeling very sleepy during the day
•waking up with a sore or dry throat
•poor memory and concentration
•headaches (particularly in the morning)
•irritability and a short temper
•lack of interest in sex
•in men, impotence (inability to get or maintain an erection)
Some people with OSA may also wake up frequently during the night to urinate.