Underactive thyroid?

Does this sound like an underactive thyroid?
– EXTREMELY tired all the time
-Nausea
– Shortness of breath sometimes
– pain in my abdomen
– Anxiety
– Migraines
– A small bit of paleness
– nightmares every night.

If so, how can you treat it. I’m getting blood tests done for a few conditions, i just want peace of mind though because the results wont be back for a while, and it’s been going on for ages now.