How to get past this hump.

After 2 yrs of ttc SO has been checked and came up good. I went to the doctors and she can't seem to think of anything that would cause us not to. She's sending me to other doctors to get my tubes checked. SO thinks it's his fault and putting all the blame on him. I can't seem to get him to understand it's not him and him not acknowledging that it is or might be me is making it worse on me, and our relationship.