Tell him you want to see the test results. And you both need to be tested. If he doesn't have all of the results, then either the doctor or the clinic needs to give him a copy or he needs to go through the entire STD testing process again--all of them.
It's hard to believe that our loving Hs can do something so awful and pretend like nothing happened. But, unfortunately it happens more than anyone would care to imagine, thus the need for a website like this one. Your H needs to come to some understanding as to why he allowed this to happen and why he would risk EVERYTHING for something so ridiculous. (My H had two A's in a very short period of time while I had moved out of state and was waiting for him to finish fixing up the house so he could move here too. He tried to play it off as if I had the overactive imagination.)
You and your H have much to discuss. Dr. Harley says that we need to protect our M by not allowing conditions to permit opportunity--such as being away from spouse overnight. I would encourage you to read some of Dr. Harley's information on this website and his books, complete the ENs questionnaires available on the website, and know that you are not alone. Healing and rebuilding of trust takes a LONG, LONG time. It is not for the weak of heart. My M is healing because my H is finally learning to talk about his feelings and learning to understand WHY this happened. And we RARELY are apart overnight. (I'll be honest that when we are, I am sick to my stomach with worry.)
While the conditions that brought you here are not what ANY of us would have wished for, know that you have found a good source of comfort and support.
Good luck and God bless.
SS