Hi! One thing you forgot to mention is what is your age? Secondly the symptoms that you just mentioned, were they present before you started the drugs or did they start after the start of drugs. Thridly, a mention of the names of the drugs that you are taking for MDD and GAD should have been helpful. The symptoms you mentioned, can be very much cause of the medication adverse effects, especially that of SSRI's if you are on one of them. You should immediately get hold of a physician or a psychiatrist
who would like to run some blood chemistry tests for you along with a USG. The symptoms can be part of the GAD, but you still should get investigated.
Hope you get well soon.