hi..i m 28 years old.i have done folicular study. on 7th day L.O - NO df, R.O- NO df,Endometrial thickness is 5mm.on 9th day L.O-No DF R.O -No DF ,endometrial thickness is 6.5mm.on 13th day L.O- Df of 21mm and 17mm and R.O -no DF and thickness is 8mm.I do have thyroid and also taking tabs.Is it normal?