Hi, did you have a laparoscopy to check if the endo had cleared? Often scar tissue and adhesions form with endo which can cause fertility problems even when the pain and discomfort go away. It is always a good idea to check your thyroid with secondary infertility as the thyroid tends to slow with age, I find that this is a common cause of secondary infertility. If your thyroid has not been checked in a while ask for a TSH test about 7 days after ovulation, ideally it should be below 2.0 for fertility, the USA average TSH is around 1.3 which is a good place to be. Hope this helps