Trying for a baby. For our problem.

Myself and my wife are from same age 29. We got married 1.5 yrs ago and we are trying for a baby since last 8 months. Still my wife is not conceived. My wife have gone all the blood test by May 2018 and results looks normal except the TSH level it was 10 mIU/mL. She is taking thyronorm with 75 mcg now and the TSH level is 0.146 mIU/mL. I have undergone all the blood test and semen test on May and all looks normal. But when we had intercourse my semen is coming out faster less than a minute or 2. I have consulted a sexologist and he suggested me to take penile Doppler, scrotum Doppler and tescretal Doppler scan to diagnose whether it is Premature ejaculation. But all the results looks normal. I am worried now whether the TSH level in my wife results or quicker ejaculation problem in my result is affecting the chance of conception. Please help me on this and provide solution for our problem. Thanks for your help and solution in advance.