Thyroid conditions can be missed due to numerous factors. But to start with check your TSH, free T4 and free T3.
Btw, PMDD was made up in Eli Lily's marketing department since the Prozac patent was running out. They repackaged Prozac as Sarafem to treat this new made up disorder and spent 33 million to promote the drug. smh.
How was it made up? I literally do not feel depressed/anxious the entire rest of the month ONLY on my period...if they can actually measure hormone levels (which they can) how is anyone making up PMDD? Also no one has ever suggested prozac to me to treat it, ever. Sounds like a conspiracy theory.
Youtube search: "Making a Killing: The Untold Story of Psychotropic Drugging" to watch the documentary for free.
Actually the documentary is "The Marketing of Madness: The Truth About Psychotropic Drugs." Also free to watch on youtube.