Trying to get prego

Sara
I had 2 still borns 2012-2013 in nov
Found out in nov 2013 i have a blood clot disorder aps
Hubby and i been trying over a yr still not prego
Hubby is perfectly fine 
What type of test can my obgyn do to see y i cant get prego 
Only test they did was 
U/s nothing blocking
Levels r fine