I am 37 years and my husband is 38 years old.we have a son who is 7 years old. We are trying for a second child. But very unlucky.we both are relatively healthy except I have tsh of 5.94 for which I am taking thyronorm for 50 mcg. While conceiving first child we had used pregahope lubricant. But now it's out of market.its been 6 months with no luck. I am tracking my cycle.kindly suggest