Hi, 
Thanks for writing to HCM.
I understand your concern. 
From the description you have mentioned, it appears that you are unable to conceive is primarily because of 
thyroid illness and your husband's 
low sperm count. 
Since you are already been put on medication 
Thyronorm, it will take some time (say about six months) for your thyroid levels to be back to normal. Also Ovifert and Smartova will help you to improve the chances of conceiving. Your husband's sperm count improvement by taking Fertisure also adds to it. 
Since you have been trying for 6 months, it is advisable to wait for another 6 months to happen naturally. 
Assuming that your tubes are patent and your cycles are normal, you may also time from now on by means of follicular scanning, which would give you a good chance to happen. 
If it doesn't happen, don't have to be worried. You can go for assisted techniques like IUI or IVF. 
Hope the information provided is useful. 
Wish you all the best.